I had Moultrie's first unit that they came out with 3 yrs ago. I've gotten some great pics with it but it has also been sent back to Moultrie 3 times for warranty work. My uncle just bought Moultrie's new model from Bass Pro and he's sent it back twice for work in the last month. I'd be a little cautious with that brand. I think the "best" 35mm camera out there is the Camtrakker but it is also the most expensive. I would definatly stay away from the infrared models (Highlander and Game-Vu) that market themselves as "digital" cameras. The infrared quality is poor at best.
My suggestion is, if you have any handy man skills at all (and I mean
any), go to the same web site that Strut mentioned and go to the "home-brew camera" section and msg board and you can learn how to build your own for almost nothing. There is also plans on how to build a digtial set up with an Olympus camera. I've build 4 of the digital units in the last couple months for me and my buddies and they work GREAT!!! The best part is I have NO developing or film costs anymore.
Check out some of the pics I've gotten in the last few weeks.
http://groups.msn.com/EastTexasHunting/pictures
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Hunting the Piney Woods of Deep East Texas.