I had a wheel with a Velocity Aero rim, it looked good and the round section was a nice change of pace from the regular box or V shape rims. Plus the relatively shallow section made building a breeze. That said, if you already own a CXP33, just get another one and build your wheels with them, they are nice enough and should be easier to get your hands on. (CXP33 have these plastic bits inserted into the spoke holes right? That should help make building a bit easier)
I had a wheel with a Velocity Aero rim, it looked good and the round section was a nice change of pace from the regular box or V shape rims. Plus the relatively shallow section made building a breeze. That said, if you already own a CXP33, just get another one and build your wheels with them, they are nice enough and should be easier to get your hands on. (CXP33 have these plastic bits inserted into the spoke holes right? That should help make building a bit easier)