In this case, I don't know if you can get good and cheap together.
I've always used and recommended APC, although I did run into a bad unit last year. I returned it though, and used the money to buy a better model. That'll teach me to buy the one on sale at Sam's Club.
I know the reviews are mixed (once you account for user-error), but I haven't had a problem with any of 3 units.
I now have one of these at home, and have 2 more at my office. We've had power outages/brownouts several times this season, and I haven't had a single problem. It did it's job each time. I know the 2 at work have registered outages, but never when I was there, so nothing was turned on.
Just my 2c worth...hope it helps,