I have had really good luck with Browning Strike Force cameras. I have some at least 5 or 6 years old and still going strong. In fact, every Browning I have is still going strong (hope that didn't jinx me). They run on only 6 AA batteries and last a long as some others that required 10-12 batteries.
When replacing some others that gave up the ghost, I recently discovered there are now multiple cameras in the Strike Force series and prices cover a fairly wide range. I always stay on the low end and will never pay more than $120, and usually 20-30 less.
I generally run about 20 camera across multiple properties.