Yamaha DTXpress/DTXplorer/DTXtreme

Hi there I'm looking for information about amplifing my kit with the 
cost of amplifiers being what they are i have no interest at all in 
buying an amp which isn't going to do the trick. going through the 
hassels of returning an amp because it doesnt sound good enough isn't 
what i'm looking forward to either.does anyone have a really good amp 
that they are using which will give my kit the sound i'm looking for 
without costing a fortune?What i've been thinking of buying is a powerd 
speaker (behringer B215A or simular)200 watts 15" speaker with voice 
coil.anybody tried this yet and if so what are the results?what i want 
is a kit that sounds as close to an acoustic kit as possible at levels 
which will compeat with a marshal stack when practicing in the garage 
because we all know those primadona guitarists just won't leave the 
volume knob alone for more than half a song at a time.(usually about a 
quarter note into the song)     thanks geoff