I'd ignore the Marantz 180w @1khz figure. It is cooked to make it seem more impressive. In reality at 6 ohms your more likely to see 140w at the same distortion. 180 is getting close to double down territory, and should only be possible when being taxed by a 4ohm load. This is with great geat of course.
I'm a firm beleiver in buying used high end equipment. The burlier the better. Sometimes, high end stuff is owned by wealthy, fickle audiophiles. They clean their gear with cloth diapers, get bored, and sell them in a few years for pennies on the dollar. Like new and usually 25% of msrp.
