CW-X Pro Tight
I purchased the CW-X Pro Tight and love it! I'm 5' 8", weigh 130 and I got the size M. The first time I put it on it seemed a little tight but I'm confident now it is the perfect size. I've worn it for 2 weeks and have had no soreness, muscle aches, twinges, etc. at all. ( knock on wood ) I used to get soreness in my hip joint areas.
I highly recommend this.