#1
http://www.musiciansfriend.com/guitars/engl-special-edition-e-670-100w-guitar-amp-head-6l6

Im looking for an amp with brutal distortion for melodic deathmetal, with good cleans, and the ability to have different amounts of reverb set to a clean channel, a distorted channel, and a lead channel.

I cant have multiple pedals because im also the lead vocalist in my band, so switching two pedals while singing is too hard, so i need an amp that can do it for me.

I currently use a line 6 spidervalve and want to get a higher quality amp that isnt 4000 dollars.
#2
midi setup might be the most appropraite option, so you'd look at getting rack equipment though probably be a bit costly.
#3
Golden rule when buying something. "You get what you pay for", and what you want to get, you're gonna pay more.