I've been lookin on ebay for high quality used receiver. I'm a sucker for Pioneer. here are the 3 that I have looked at recently, 74 txvi, 72 tvv and the 56 txi. The first are newer models with hdmi, which i'm not really concerned about and the 56 has larger capacitors and is nearl 10 pounds heavier (beefy

). Anybody have a couple thoughts on these picks. I'm also trying to stay around $500 since shipping is usually $100 to Canada