You need one that will accept the multi channel PCM output of the player. Don't assume that if the receiver has HDMI 1.1, the receiver will do this. Most Denons will, the newer Yamaha's, and although my HK745 don't, it's supposed to. Your best bet is to do exactly what you have, ask for input on specific receivers from folks who have them. You may want to ask this question at AVS on the HD DVD board.