bigcountry, I have had no experience with the D55IR, since it is a totally new camera, but I have owned two Moultrie I-40s and I can tell you they take the best pics of any of my cameras, and I have ten different brands. You can get them right now on Moultrie's site at a really good price, since they aren't going to be manufactured anymore after this year. Here's the link.
http://www.moultriefeeders.com/catal...redgamecameras
You also might want to go on
www.chasingame.com to read reviews on just about any camera made.
www.trailcampro.com is also a good place for reviews and an even better place to purchase from. Here are some pics, both day and night, from my I-40. Hope this helps.
Blessings.....Pastorjim