Yeah, I'd go with the Crystals, too, as long as you're running them with their passive crossover set, and not giving them more than 200w RMS a side.
The midbass from their Kevlar mids is really nice and strong, and the tweets are titanium, but not harsh sounding at all.
I haven't heard the RSD comp, but I've read some good things about them, too.
BTW, I've got a BNIB set of SSCS6's I'm selling for $150 shipped in the U.S. PM me if you're interested.