I am a proud owner of a yamaha rx v673 now. I bought this receiver to replace an old but still working yamaha HTR 5760 in my bedroom, just for 2-channel audio. Bought the v673 for $99 used. I tested all the inputs/outputs, airplay, etc and everything works just fine. The only thing I can't test is the 3d pass through because I don't have a 3d tv, but regular 1080p 60hz through HDMI works fine. So far the only thing wrong with it is cosmetic. Small dent on the top left near the front faceplate and a small dent on the top center.
I just feel that I got a great deal with this unit, it has all the features I want and sounds great. The receiver is hooked up to two Klipsch R15m bookshelfs.
In the living room I am running a yamaha rx v665 that I bought for $60.