Yamaha DTXpress/DTXplorer/DTXtreme

I'm fairly new to this group.  I've played the Roland TD-7 for years,
but it was the church's set and I want to buy my own set.  I've done
some brand comparisons and I'm kind of sold on the DTXpress.  You may
have covered this in the past, but what's the comparison, say between
the DTX 2 and the DTX 3 (not the the Special, just the basic model)?
Anybody have preferrences?  Anybody have links for pages I might look
at?  I may have opened a big can of worms, but isn't that what
discussion lists are all about? <GRIN>
 
Thanks,
 
Rick Anderson