Hi guys I need to upgrade my yamaha rx-v757 av reciever as i need hdmi inputs and HD audio decoding. I have KEF 2005.2 speakers and im hoping ide get an improvement in sound quality when i upgrade. Problem is, i dont know if i will. I have currently seen the Denon 1912 going for just £279 and was wondering if this would be an improvement over my yamaha? Think it has slightly less power though. How about the yamaha rx-v671? would this give me an improvement in SQ? or do i really need to make a bigger step up to something like a denon 2312 or rx-v1067? Ide like opnions as £279 for a 1912 is very tempting thanks p.s anyone heard the 1912, rx-v671 and onkyo nr609 side by side?