Sounds like I should lean toward a real kit with mesh heads -- I played percussion through high school and I think I'd be disappointed with something that doesn't come pretty close to the authentic bounce feel.
I see that Roland has quite a few lower-end kits that at least have a mesh snare... even their cheapest one has all the pads necessary for RB, plus an extra cymbal and pedal compared to the Ion, and it's a pretty affordable $600. Or I could go with the TD-4SX which looks to be similar to the TD-9SX but with a cheaper sound module.
Hm, decisions... I'll have to check out that link.
Thanks, I appreciate the info!