Yamaha DTXpress/DTXplorer/DTXtreme

Ed,
> By "dynamics" do you mean the range between really loud and really soft? 
 
Yes.  All accents and ghost strokes triggering accordingly.

> Are you saying that  the Yamaha sacrifices clear mid-level gradations for a wide dynamic 
> range?

No.  The DTXpress does not sacrifice  any 'mid-level gradations'.  The tracking is superb, very close to an acoustic drum. If dynamics on 
an acoustic drum was '100%', i would rate the Dtxpress at about '85%' and the Alesis D4 at '65%'. 

Jun