Dang $2500 is a lot of scratch for an ekit.
K here goes my suggestions, others may disagree and that's ok.
1. Since you plan to just use the drum module for SSD or SD2, then sound quality should be the last consideration with this purchase.
2. If you need this to be as quiet as possible then mesh heads are the way to go with rubber cymbals. If noise isn't an issue then snag up something with real heads. Avoid rubber pads, I think they feel the absolute worst and cross talk seems to be a bigger issue (double triggering between drums)
3. If you can swing it then instead of mounting the cymbals to a rack, put them on stands. You can up the sensitivity without having to worry about cross talk.
4. Get a module that has some expandability. Nothing worse than a cheap module that only allows a 5 piece with 2 crashes, a hat and a ride.
The Alesis DM10 module for example can do considerably more than what I just put and accommodates both high hat controllers with variable open close settings as well as triple zoned triggers (like rides for example where you have the bell, bow, and edge or the snare where you have rimshot, side stick, and center/head).
Lastly, be prepared to tweak on it. Very rarely do drum modules just work right out of the box the way you want to. My friend with his DM10 Pro (with the surge cymbals) had to tweak it considerably before it was even playable. Apparently the cross talk comes turned off from the factory and he couldn't hit anything without everything else triggering. haha
Not all drum modules will be as bad from the factory as what I described above (like Roland for example) but stuff like sensitivity and cross talk have to be played with.