Re: Roland or Yamaha?
I'm not experienced with the TD-9 but I own the DTXpressIV and I like it a lot. If you are willing to take the time to tweak the settings to make your own kit, then you will probably be happy with it. The Yamaha Custom series sampling almost makes it worth it alone....I sometimes also use it to trigger my acoustic kit.
Sabian cymbals, Tama drums, Gibraltar hardware, Evans Heads, Pearl pedals, Pro Mark Sticks.