Yamaha DTXpress/DTXplorer/DTXtreme

well, ive been putting in off for long enough... i need an electronic drumkit. my 
price range limits me to only a few kits. all of which are entry level. that is fine 
with me (this is really going to be only a practice set... not for playing live). so, 
ive narrowed it down to these kits, in order of least to most price:
hart prodigy
yamaha dtxpress
roland vclub
well, i have knocked the hart kit out. i dont like the pads. now the vclub and 
the dtxpress kits are similar but have things that i like about them that the 
other doesnt have (like dt has room for a double bass. vclub has more kits). 
not to mention that the dtxpress is $300 less. 
anyway, my question is if any one has played both kits and can give me an 
opinion.

thanks...