Harman AVR 510 5.1 Channels Receiver

So I go into my nearby Circuit City store, and see the clerk in the components area. I'm shown the Harmon Kardon 510, as an open box special. This is an expensive receiver, selling for around $600 when it was current. Oh, this is not a 2002 model, which is another reason it's cheaper. I get it home, hook it up, and try to read the manual. Or use the remote. Not easy tasks I must say. While the receiver is a beautiful thing, using it is something else. The amount of control is amazing, and therein lies the problem. It takes quite a bit of time to figure out all the connections, to the TV, DVD, CD and VCR. Once that is done, I try to use the onscreen feature thru my TV- no go mate. Can't see a thing. It's supposed to make setting up easier, but just trying to get the wiring right to use it is impossible for me to configure. It also had a number of intermittent problems. It turned off in 3 seconds, everytime I turned it on. I checked my speaker connections, and finally got it to stay on. Then, after a day or so, it did that again. Because it's such a complicated receiver I thought it was something I was doing. I reset it a number of times, including resetting the chipset. Yes, that's something you can do also. An amazing device really. Finally, it's working for a couple of days! I invite friends over for some movie watching, and It wouldn't output a center channel to the center speaker. The sound goes to my front left speaker instead. Very frustrating, and I was unable to correct it. I took it back to Circuit City and got another brand- Onkyo, for a little less money. I believe it was a used receiver, not an open box, and that it was returned originally because of the intermittent problems. That aside, this is still a complicated receiver to set up and use. I feel I got at least an equivelant product from Onkyo, at a better price ($500 vs $600), and the Onkyo is much easier to set up, while having an almost identical feature set.
In fairness, when it worked it was a wonderful thing. Clean and powerful, and stunning to look at. My lesson to pass on here is to take the time to look at how difficult it is to set up a receiver before you buy it. Or, bring it back quickly if you are having major problems. Onkyo is every bit an equivalent product, from the standpoint of sonic quality and features, but they make it much easier to actually use their product. See my review on the TXDS595 for more.
Also, in fairness to Circuit City, they took it back, with absolutely no hesitation.