I have the Cateye Astrale 8, and love it. It's small, and is very easy to read and program. Since using it, I've discovered that I cannot live without its cadence feature, which is important for training. IMO, it is the most useful of the Cateye offerings. I also have the Cateye cordless computer, but because it has no cadence, it is going bye bye.
Now, for my new bike (under construction), I was considering using the Sigma BC1600 coupled with the Sigma PC1600 HRM (worn like a watch). I have a Tacx Grand Excel trainer, so I could just omit the PC1600 when training, as the trainer has an internal HRM. I believe the Sigma computer cannot be set up for optional cadence *and* be wireless.
Having learned that the Vetta V100HR has *both* cadence and HRM capability, that seems like the best, least troublesome option, especially being that aside from having everything in one device, all features are wireless compatible. I'm not convinced as to the reliability of the wireless option, but nevertheless, it is the only cyclocomputer I know of that combines all of these features - and the cost is reasonable considering what you get.