No, the RX-V2600 does not support 1080p, nor does it support 7.1 PCM over HDMI, only 5.1 PCM over HDMI, these are the reasons I went from the RX-V1600 to the RX-V1800, but since I had also upgraded tv's too, I can't say I noticed a difference or not. But I would say you would see an improvement, but I would also say check out the RX-V1900 instead of the RX-V3900, unless you really need the extras that it adds, which in my book aren't worth the extra money.