Hey man,
I recently did the same thing. I got my m60's and used them for about a week on my '86 Mitsubishi receiver my parents got me when I was a kid. I immediately noticed the improvement over my even older 3-way floor-standing Pioneer speakers (with real wood cabinets). Then I got a Denon integrated amp and a Denon AVR3805 to audition. So far I'm still on the integrated, because I'm most interested in 2-channel. The 3805 will get hooked up for a test drive this weekend.
Anyway, the difference is night and day. My old receiver just wasn't doing the m60's the justice the new amp is. Oh, it would drive them alright, but the new amp makes them sound like there is a band in my house. Everything is crisp and tight. At this moment, it sounds like Jeff Beck is performing Constipated Duck in my living room.
Enjoy your new gear!
