I would not get the A-5 because it does not have a burst mode and the minimum delay is 1 minute. You could use it with bait but you would still miss a lot of pictures. My old Moultrie d40's have a 1 minute delay, which I don't like, but at least it has the 3 shot burst option, so that makes up for it. With the A5 you'd get only one picture per minute. Not good.
I have looked at the d333 because it has a 10 second delay and a burst option of 1 to 10 pictures. However I have read too many poor reviews of the 333 so I would not try it either.
The d55irxt has a good reputation but it's more money.
The camera I would recommend in the same price range is the Primos 35. Amazon has a great price on it right now- $68.10. So for four cameras you'd only be spending $40 more. I have had one for a couple years now and it's been trouble free. It's got a very fast trigger so it works good on trails without the use of bait.
http://www.amazon.com/gp/aw/d/B003PVGA1O/ref=aw_d_dsc_sporting-goods?qid=1388344781&sr=8-1