#1
I play mostly Christian Rock with lots of clean and lightly overdriven tones, and lots of chorus and reverb. I'm trying to give my amp tone a little more clarity and definition over the stock speaker.

The Swamp Thang seems to be highly regarded and it costs around $20 more, but after listening to lots of sound clips I'm leaning towards the Screamin' Eagle.
#3
what amp?

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#4
It's a Hartke GT60c hybrid combo amp. 60 watts, tube preamp, SS power amp, 12" speaker. Not an expensive amp but it sounds good and works well with my pedals.

It's closed back but has 2 tolex covered wooden covers on the back. You can take both covers off and the entire back is open, but I removed only the top rear cover. I tested a bunch one day and liked the tone best with only the top of the rear of the amp open.