Well I don't have comparative experience, but I have a dinged up Marantz 2250, with burnt out bulbs and somewhat scratchy volume and balance pots. But damn the thing sounds great. Musical, powerful, dynamic, warm, tuneful. Really good FM -- decent reception, excellent fidenltiy. Beats up on a couple of NAD untis I have, one intergrated and one rceiver. The wife really likes it alot -- it's the only audio purchase I've ever made (it was a steal at like $75CDN) about which she's never even bat an eyelash.
In teh 70's, for mid fi types, Marantz, above all others, was the dream name. With good reason.
Richard