I thought about having a pair of the H+Son SL42 rim's built onto a powertap (in fact been looking at those rims on and off for about 3 years now, in various guises) and a matching disc cover for race day (with a Trispoke on the front for TT'ing, the other SL42 on the front for training, crits and RR's), but now I have gone off the powertap idea in favour of a crank based power meter!
I have also been saving up for Power Tap long enough to now have moved onto saving up for a crank one