Yamaha DTXpress/DTXplorer/DTXtreme

I've been hearing that some of you guys have been having kick tower 
problems. Now is that with the DTX one or two? I haven't had any 
problems with the kick tower from DTX2 but should I expect any? I've 
played it without the headphones and heard no noise other than that 
of the pedal hitting the pad. I'm very happy with it as of now so I 
wonder. Hey my friend came over and tried out my DTX2 and he loved 
it. He by the way has a Roland V Session set and he says that our DTX 
has a few features that his Roland doesn't have. For you DTX2 owners 
there's a few songs there that are great to practice to. The fist 8 
tunes are all good but I happen to like #5 VBOP2001. That drummer on 
that tune is a Monster!! If you take the accomp. volume down and slow 
the tempo you can grasp what the cat is doing, great independance... 
smoking. I'd like to know who that cat is. Also just wanted to let 
you guys know that this group has been a tremendous help, thanks 
again.