Pretty close spiff. For some reason, Denon chose to recalibrate their lines (DVD and Receiver). The 2900 actually sits between the 2910 and 3910 and gets about 80% of the distance to the 3910. The 3910 sits between the 2900 and 5900 and gets about 60% of the way to the 5900. The upcoming 5910 (at a large MSRP) will trump everythiong.

My comparison numbers might be off a bit, but you get the gist. The 2900 and 3910 are the ones that should be compared, with the 3910 getting the edge. The 2200 and 2910 should be compared, with the 2910 getting the edge.