I honestly don't see how you'd adjust the camber, at least up front(rears can be shimmed out).
I'd say the Hardrace upper A-arm is probably the best you can get besides the A-Sports one which probably costs 3x more. The Hardrace unit uses bigger bolts than the Skunk2 which means much less chance of it slipping. Matter of fact, I've yet to hear the Hardrace slipping while a couple of guys RR/AutoX guys on HT have had the Skunk2 slipping.