I bought the TD-12 with the intention of replacing my TD-9, so I just went back to the TD-9. Then I changed to a TD-17 but was ultimately unsatisfied with its sound. The TD-9 was repairable but quite costly, so I sold it to be used as a MIDI trigger.
Now I'm probably moving to Simmons. I like the hexagonal SD2000 design and mesh kick (Roland mesh kicks COST!). I also like the feel of Yamaha DTX pads, but I'll need to see how durable they are, respectively.
Simmons is upping its game which is great, if you want a better bass drum that doesn't break the bank get this:
Enjoy the lowest prices and best selection of Trigger Pads at Guitar Center. Most orders are eligible for free shipping.
www.guitarcenter.com
Or do like I am going to do get a footblaster trigger and use a real 22 inch bass drum (with a mesh head) to keep the noise down. still way cheaper (and better looking than Roland)
footblaster.com
Finally, you might be disappointed with a Simmons module, like I said, they are upping their game but their modules still need some work.
And also if you had a Roland module, you could try some sound packs. There are some great ones at Vexpressions.com and they are quite affordable at around $75 each. Drum-Tec also offers those for even cheaper I believe.
The one thing that people don't realize is that when listening to the drums alone, they might not sound fantastic (they do sound great) but when listening to them in conjunction with the music, they just blend in perfectly.
Finally finally (yes twice finally), a lot of edrummers do themselves a huge disservice by not adjusting the module to THEIR playing style, Meaning, you have to go into the settings for each pad, (all drums and all cymbals) and adjust sensitivity and other things in order for the module to register your harder hits as well as your softest hits
correctly thus giving you a much better experience.
Yes it takes a little bit of time to do that, but once you do, you will be amazed at how much better your drums respond, now you are able to play all kinds of things that you couldn't before (ghost notes and such). This is very important.