I am planning on upgrading an old pioneer Elite receiver that had it's Hdmi board go. I'm looking at either the sc-71 or the sc-72. Just wondering what thoughts are regarding the sc-72 worth the extra $300. Local store has both open box for 700 and 1000. I did notice the sc-71 weighs in at 25.8 lbs while the 72 weighs about 32 lbs. Interestingly last years sc-61 is also around 32 lbs. not sure if that is not good for the sc-71. Anyone know why the loss in weight?