Wired Cateyes all the way. I had a Topeak Panoram (the V12) for nearly a year, and wouldn't recommend that, nor would I recommend wireless.
Whenever I turned on the headlight, the computer wouldn't receive a signal anymore.
It also wouldn't automatically wake up when you started riding, so I had to manually turn it on every time. This is a problem across the Topeak range, and for that reason alone I'd recommend Cateye.
Now if only I could find a set of NOS Mity2's, ...