I've got a Leaf River IR7SS that works pretty well, although the night videos leave alot to be desired. If you have an external flash you could use with it, it would improve it. I will also tell you that it is pretty hard to program, this coming from a veteran in the trailcam habit. I'm curious as to why you are set on a Leaf River. There are many companies out there now that are available with audio.
Blessings........Pastorjim