I think that this <http://www.mars-cam.com/cameras/board_bw_cameras/v1207.htm> one with the pinhole lens would be the best out of them all, as it's not extremely expensive and can be used with IRLEDs (i think). Though so far my favorite one is the one I found (is that link broken too? or did i ever post the link?) that is color until the light source drops below a certain level, then becomes a low-light camera (B&W). In this instance, IRLEDs can be utilized. I don't remember the cost though.