I have several Specialized Speedzone computers which work well, but I can't actually recommend them because they've been completely redesigned and I can't vouch for the current versions.
Nevertheless, I use basic bike computers primarily to provide current speed in mph (my Garmin works in metric), a bike-specific odometer, a clock and trip odometer that's there when the Garmin isn't, and occasionally for the thermometer function.
Odometer duties are severely compromised by a computer that needs to be manually woken up before use, which is a strong argument for wired computers. I've also found wired to be more reliable, but that seems to be one of those YMMV things: For every tale of nearfield wireless dodginess and battery woe, there's someone complaining about a wired computer failing due to contacts getting wet.
Avoid anything that can be reset by pressing a single button. That's a recipe for frustration if you're going to remove it from the bike (although I've lost more computers to falling out of pockets than theft from unattended bikes, so I only remove it to bring the handy clock/thermometer into my tent while cycle-camping).