What Beer to Pair with Venison?

Not being a hunter, but enjoying both food and things that are free, I was more than happy to accept a friend's offer of some venison from his recent hunts.

He was kind enough to give me some backstrap, described as one of the best cuts of meat aside from the tenderloin.

My plan is to marinate it in some way, though I'm not sure in what base. Any ideas on pairing beer with deer, or game in general?