MrPirate2882,
Any receiver you buy, regardless of who makes it, will be obsolete as far as up to date surround formats and features within a few years. If HDMI is not important to you or you could do external switching, I would recommend picking up the 2500. It is half the price of the 2600 and several hundred dollars less than the 1600. To put this into perspective, my 2500 is less than a year old and I bought it the first week it came out and it is already outdated. The 2600 would also be lucky to see a year old before Yamaha starts selling its replacement. The important thing for me is the 2600 doesn't put enough new technology on the plate for me to upgrade. Does it add enough for you to double the price of a 2500?