You don't have to be concerned about using 3 zone cymbals with megadrum. I had tried all possible designs and it works without any problem (single, double, 3 zone, piezo/piezo/switch, piezo/switch/switch).
This is a European haven for customizing your own, unique e drum set. I'm shure that you can find similar shops in USA.
http://www.drum-tec.de/index.phpMy choice in this moment will be drum-tec pads and yamaha cymbals, but there's roland too (they are more expensive for the same level of product quality). I would avoid alesis.
I mean for the similar price between roland 125 or 108 and drum-tec pads I choose drum-tec because they are real drums with real wood shells and they look awesome. I don't mention triggering cose I guess that there will be no problem.
I adore those drum-tec bass drums.
Golden grail of electronic drums. Enjoy:
https://www.youtube.com/watch?v=pkNbnkTH4g8