Yamaha DTXpress/DTXplorer/DTXtreme

I've noticed the salespeople who favor the rack style systems are 
sometimes not drummers, so their ear is for certain sound not 
necessarily what a drummer may want to hear or "feel". I say that 
because two salemen i talked to are active drummers as well said 
when you hit lows on the toms, it's gratifying to feel as well as 
hear the bottom lows. (only a drummer would appreciate and 
understand that). They said you get more of that feel from a keboard 
speaker because they're larger size speakers. Their personal use and 
recommendations were Roland Kc550 or Kc350 amps.