cam trakker is what I'd recommend. I have used others but the cam trakker is the best in quality and function, IMO worth the extra. BTW cam trakker is bring out a new entry level, not sure of specs yet but it is listed at 229.00 on their website as coming soon. www.camtrakker.com
It might be worth emailing them to get details on it!

Have you considered builting them? checkout www.jesseshuntingpage.com pretty good information/resource with regards to game camera's.