Here is what I own and use on a regular basis:
Razer Boomslang 2000 (yes, a ball mice)
Logitech MouseMan Wheel Optical (the big one, with the blue LED)
Logitech Wheel Optical (smaller corded one)
Logitech MouseMan Cordless Optical
I personally never experienced any problems with the Logtech MouseMan Wheel Optical or the Logitech Wheel Optical. However, the Logitech Wheel Optical seems a bit slow to response compared to the MouseMan Optical. 😉 The Cordless Optical is fine, but took a while to set it up and have the drivers work properly. Also, it works perfectly fine, but sometimes that "sleep" mode gets annoying. Opticals are great, and saves from cleaning the ball.
However, even with all these optical mice, I still prefer my Boomslang 2000 since I like the shape of it, and it's responsiveness. I use it on my main computer for graphics, web design, office applications, and gaming. Works perfect in all. I had to clean it once in the year that I owned it.
I suppose it's all a personal preference and what you are used to. By the way, trackballs are awesome as well, but I'm still trying to get used to it before I go buy one. (Microsoft Optical trackball at work. 😉 )