For the tonal preferences, music genre(s), power requirements and budget restrictions that you've cited, the GK 1001RB-II is the clear winner - by a mile, IMO. As for the GK MB800, it's not even on the market yet - unless I've missed something...
Even if the MB800 was on the market right now, for your purposes I'd
still get the 1001RB-II. Just do it. You won't be sorry...
MM