I debated LM, CH, and RS-GT's. I eventually decided upon the RS-GTs and am happy. If you are oriented towards the lightest wheel then RS-GTs or RGRs may be what you want.
One advatage to the CH is that it is a cast wheel and would be easier to repair if you rash them. I dread curb rash on my wheels - so far so good with the RS-GTs.
AW on Fox Red Extended, Alum trim, ZPP, ZTP, DCT, 19" wheels, Heated front seats, HD radio, Sat radio, I-pod & usb, Premium sound, AP racing BBK, 18 Volk Racing TE 37s, Akrapovic Evolution exhaust, AST suspension