amplifier preference is a lot more than just demoing a amp at a dealer, take one home and try it if you can . that being said , a lot of used amps can be found on Audiogon or e-bay if your careful . Another BIG FACTOR is THE ROOM IT SELF, some people blame their speakers for a poor room setup or room resonances, when in all reality that room cant sustain certain bass frequencies. This is where a good spl meter and a demo disc can help