If I'm understanding this correctly, you're using a Line 6 Spider III head that has two outputs meant to go into a speaker cabinet. Instead of going to a speaker cabinet though, you're wiring it into the inputs of the RC-3.

If that's what you're doing, that's BAD. The RC-3 is designed to record your low level guitar signal BEFORE it hits the amplifier (i.e. guitar->cable->rc-3->cable->amp input). You may have already damaged the pedal by accident because it's not supposed to be connected to high-powered amp outputs meant to drive speakers.

If you want to record with the effects on your guitar, you need to use more pedals in the chain before it OR connect it to the headphone out on your amp:
guitar->cable->distortion pedal->reverb pedal->rc-3->cable->amp input OR
guitar->cable->amp input->headphone output->1/8 input on rc-3.
If it's your first guitar? Don't get the one with the whammy bar. There are many reasons:

1: It makes maintenance much more complicated for a beginner.
2: It is absolutely nonessential, even for a rock/metal player.
3: A fixed-bridge guitar will be more versatile for you right now (you'll be able to change tunings quickly and try out different gauge strings without a full setup).
4: Not sure about the exact models you listed, but Ibanez's floating bridges tend to not be as reliable as a proper Floyd Rose bridge (if you let go of the bar in the wrong place, the strings won't return to being in tune by themselves).
5: If, at some point in the future, you find yourself playing/writing a song that needs one, you'll have sunk enough time into playing that you'll want to buy another guitar anyway.
6: The other guitar sounds better to you. Go with your gut.

EDIT: In response to you watching your friends do dive bombs and stuff, here's a quote from the other guitarist in my band:
"I found my whammy bar yesterday. I put it in my guitar while I practiced, and then I remembered why I put it away: I just waste time doing dive bombs and making cool sounds instead of actually playing the damn guitar."
I never understood the fascination with tremolos and Floyd Rose bridges. But I'm a rhythm guitarist so what do I know.
Anyway, you should be fine dropping the lowest string without doing any other setup. But if you are tuning down the entire guitar, say from E standard to D standard, you'll want different strings, and with that comes adjusting the action, probably the truss rod, possibly the nut slots, etc.
My setup: one guitar each for E standard, D standard, and C standard, with a relatively thick gauged string on the bottom for down-tuning. I've had to mix and match strings from different gauge packs in the past to get the exact tensions that I want.

EDIT: Referring to hard-tailed guitars of course, if you decide to get one.
You can absolutely mix and match strings from differently sized sets without much of a problem. You want to make sure that your string tension is relatively normal and there are calculators for that (, shoot for between 14 and 18 lbs for each string). You may also have to adjust the intonation for your new strings, but your neck tension will probably be fine.
I dont know what to tell you about the nut, but you definitely will not be able to tune the 10s down to A#. If youre playing in D Standard/Drop C you might want to consider using 11s instead, I use 10s for Eb tuning.
Quote by inlovewithmusic
Hey dude ....

thanks for the reply ...just out of curiosity ....can you gimme an example of a singer that
you think sings with a lot of emotion on high notes

Look up Dracula (Matt Barlow of Iced Earth) or Breaking the Silence (Geoff Tate of Queensryche).

I am not mocking you or anything, just want to share with you what some truly talented singers sound like. They can go amazingly high while still being very expressive. I think James LaBrie sounds just fine most of the time but sometimes his voice gets a quality that I just don't like when he goes very high. I still love listening to Dream Theater.
Breaking the Silence - Queensryche
22 Acacia Avenue - Iron Maiden
Dracula - Iced Earth
The songs Peace Sells by Megadeth and Paschendale by Iron Maiden stunned me the first time i heard them. I also was watching a concert video of Dream Theater and that was absolutely fantastic. Anarchy X on Operation: Mindcrime (Queensryche) also grabbed my attention.
Ahem, Operation: Mindcrime is one of the strongest albums from the 80s. I agree with some of what he said, but when i got to the travesties, i quickly became disgusted with this list.
The Four Horsemen, Motorbreath and Master of Puppets by Metallica and Paschendale and Rime of the Ancient Mariner by Iron Maiden.
i just got all of maidens albums w00t! its almost too much at once listening to all of it is giving me a headache... just wondering what do you all think of A Matter of Life and Death?
Im a music noob and right now im going back and forth from listening to 80's metallica and iron maiden and if i continue at this pace my head will explode. XD
Definitely Dream Theater's cover of Master of Puppets. Labrea drags that band down so much...