im upping my 10+ year old system of a 36in sony tv, 20yr+ old bose speakers, a 10 year old teac and a vcr. i have alreadyu bought a velodyne deco system 5.1 which sounds amazing for the 700 i paid. bought a c740 5 disc yamaha dvd changer. in the process of buying a grand wega kf-50we610 lcd rear projection 50" tv. i have the sub cables, the svid cables, composite for vcr, and toslink cables. im going to buy some speaker wire and i need a nice receiver for under 600$. i have narrowed it down to the denon avr-2803 and the yamaha rx-v750(more towards this one). i liek how the only cables to the tv will be the audio and the component so i only have to cycle on the receiver. i really want that function whihc the rx-v650 and the denon avr-1804 dont have. ive found the prices around high 400s to mid 500s. also shud i buy a mack warranty for 3yr?