Yamaha DTXpress/DTXplorer/DTXtreme

Hi,
I'm seriously thinking in buying a dtx-express drumkit soon.
I played and tested one in a shop recently, and it looks excellent.
I also tested a roland kit,and i think the dtx gives a better feel.
(in my opinion)
Can anyone give tips about the durability of the dtx, i'm a teacher 
so i was thinking in using this for permament lessons and practice.

Is it a good and reliable drumkit in the long run? I mean it can 
sound good the first year, but does anyone here have it more than 5 
years, and how does it work? Do the pads still have the same 
feel,etc..or any problems with the sound module!

Also i want to comment on the bassdrum pedal of all these electronic 
kits, i think the basspedal is a bit fragile and moves around a lot 
(unless i put a really thick carpet,or try to adjust it not to move).
Anyone having a solution for this, im one of those drummers that 
lifts the whole leg and my pedal gets a big amount of pressure.
The acoustic kits can stand this because of the weight of the 
bassdrum.
Ok,Nice hearing reply from you all.
daniel
http://www.drumrhythms.com