I can't help much w/ ir because the models I know about seem to have a lot of problems.

i think the best all around camera is the stealth i450. it's really cheap too, $139and a $20 rebate. it's trigger time is about 2-3 seconds, pictures are pretty good, flash is strong. I'm not sure how much it sucks down batteries because I use the stealth 12volt kit $37.The camera also senses (picks up motion) better then most other cams out there. I've tried A LOT of cameras and this one is by far my favorite (i have 2 now).

there are more expensive cams like cuddeback - but I feel strongly that this stealth is better then them. i had a no-flash and it was complete junk. i've heard that cuddeback cleaned up their cams for '07 but they are still way overpriced!

Another good option is the wildview line (don't get the .3 megapixel or the wildview extreme II), the wildview 2,3,4,&5 should be good. (note that there is a difference between II and 2 - II is bad!). Problem w/ that line is the trigger speed is about 5 seconds so the cam will work best on a salt lick or a feeder. don't use it on a trail.

if you want to spend more the camtrakker's have a really good reputation and take (in my opinion) the best pictures. I think there's a digital model for $450.

anyway, good luck!