Yamaha DTXpress/DTXplorer/DTXtreme

Although Yamaha's MS-100DR is very tempting, I think it may be a bit 
out of my price range.  I'm thinking about getting a Peavey MP-400 
PA system to use for rehersals and possibly playing out in smaller 
clubs/coffee house etc.  I'm just wondering if anyone has ever used 
this system or something similar from Peavey with a DTXpressII.  I 
want to make sure it'll give me a nice sound but unfortunately I 
can't think of anyway to try it out before buying it.  Any help/info 
is appreciated.

Adam