Yamaha DTXpress/DTXplorer/DTXtreme

I went to Guitar Center and played on the most expensive Roland V 
set and then compared it to a Yamaha DTXpress. Sound wise I must 
say, I didn't really hear anything in the Roland kit that would make 
me want to spend the extra cash. Just me?

I've been eyeballing the DTXpress 3 (special) and the DTXtreme 2 
myself. 

Steve