Chris King classic/r45. The classic are way overbuilt for road cycling, hence they are on my training wheels. In the future i will get r45 on some carbon rims for racing/TTs. Both models are King quality/same price so it is up to you. R45s will have a Campagnolo option and a ceramic bearing version. You can convert the classic for mtb/disc/tandem use in case that becomes your thing some time in the future. R45 are road only and allow for radial lacing/low spoke count (imo only useful for high performance intended racing wheels. )

-Carcinogent

P.S. The Ringdrive is just icing on the cake. The buzz is an acquired taste=)