OK, I wasn't entirely fair, I didn't answer your valuable and often discussed question. There are many fans of many brands, as noted in the many AK forums. Marantz is generally very good, well made, serviceable, and it usually presents a popular sound (color). Personally I find the Marantz color warm and friendly, like a good brandy. But too much brandy and... Pioneer can be like that in their earlier series, kind of bassy, but they changed their tone in the later '70's. Some mid '70 Kenwoods have a fine balanced sound, not overly bassy or too crisp. Yamaha featured a clean, some say sterile sound. Like comparing digital to old tubes. And others, say a Sherwood S-7100A for example, have a certain "It" factor that just makes you want to keep listening for the next tune.
My favorite is a Pioneer SX-626. It's small, maybe 30w or less, but it is cap coupled, full of bass, plenty of features, sounds full at low volumes and it can rock my Klipsch bookshelves in the office, where it plays 12 hours a day. Oh, did I mention I was a Bass player?
So how will you apply the receiver? Speakers might have the most direct influence.