I own a set of Williams System 38 carbon clincher and they are a really nice wheel set. I own a set of Boyd Altamonte and although they are alloy, another great wheel set. I am sure the Carbon are just as nice. I think you could go either way and be happy. I would stay away from the others just because I have never heard of them. Boyd and Williams have a good reputation from what research I did prior to buying each set that I have. If I were going to get a deeper carbon wheel I would be hard pressed between Boyd and Williams unless my budget would allow some Enve's