Personally, Cateye. One of mine is nearly 20 years old and still going strong, I've even still got the instruction manual and original box.
Also personally, wired. Not difficult to set them up fairly unobtrusively and you won't get interference issues.
Another option is go for a GPS unit, which normally allows data downloads and can be swapped between bikes.
In my experience the only problem with the cheaper ones is the contacts need keeping clean and the mount continually adjusting, otherwise they fail to pick up the signal sometimes, particularly in bad weather. Programming them is a bit more idiosyncratic as well but so long as you are aware of all that....