I got 350 because it's 6kg, and most coilovers run 8/6 rates, so that way I don't have to buy new springs or whatnot if I adapt S13 coils or anything. My front coils are absolute crap, I kind of regret getting these HAs, but oh well, at least my car is rolling. I'm thinking of S13 Endura-tech coils, or maybe KTS next, but that's gonna be after a long while, since I'm planning a 5-speed and r200 first.
Anyway, for a little review. These Q35/J30 brakes feel freaking awesome. It's super responsive and brakes when I actually want to. I'm too scared to drive econo boxes now since I don't know when it'll actually stop!! hahah. The car itself is pretty nice just driving around. It's just a little stiff, but it's not retarded annoying and I actually like it. The rear end doesn't squat as much since I got rid of those rubber isolators(and back end actually feels responsive even though it's a CA20 LOL). I still need a little more parts here and there but I think I'll mess with my suspension after I go 5-speed/r200 and CA18DET.