What would you buy next?

Three reasons:
1. you can always get your money out when you resell!
2. you can get one with a digital volume control and run it directly into the MC-352
3. synergy between mac amp & mac CD player

I've personal experience with the Mac players. They're really nice, round, warm, lush sounding, altho not detail champs. But I think you'll be greatly pleased with the sound.

Seen several MCD7008's for sale in the $7-900 range.

Just my $.02 (and you know that free advice is worth what you pay for it!)

I am using the MC352 with-
Klipschorns
McCormack ALD-1 pre
Perpetual Technologies- P1/P3 & Monolithic combo
Sony DVD as a transport
PS Audio P300

Would suggest you look at the McIntosh MCD201 which would provide you with a pre and a source. You could keep the amp and your speakers, then sell the rest to help fund the new purchase. McIntosh also has a new pre (tube) the C220 if you want to go that route.

If you decide to go one piece at a time-Demo a PS Audio power plant and a DAC to hear for yourself if the change is to your liking.

Best of luck!

unless you are not enjoying this very nice system....don't buy anything.

What is your room like? Have you investigated what some modest room treatment will do? The addition of some RealTraps, or equivalent, don't cost much, and make a noticeable difference in performance.
Perhaps not as exciting as a new piece of equipment, but you may be selling your existing system, and any further improvements you make, short, without giving the room some attention.

I'm not familliar with the Behring but assume this is your controlcenter and EQ?Just know that I sold mac for a few years and the jump from the MC300 to 353 was really nice since you had true balanced amp sounded muchbeter.If you can swing a new/used 2200 glass pre it's a PIP.Only weakness is phono but you didn't mention that and god help if you start LP collecting now (prices being what they asre).You could get either a Mac or other surround sound but you'd have to let us know budget and how into surrounbd you are i.e. how much time or how you value it.For me regular 5.1 with a decent sub or even a good HTIB (Home theatre in a box) is good enouigh becaus I like HT but really value the 2 channel componets more.Render unto Ceasar and all that I say.To me even mediorcre HT sound fine but muisc is where the rubber (or your budget dollar) hits the road.Others of course disagree and in the main more folks than not are trying to get equal quality.But given your amp and speakers that would be expensive.Good digital has goten really much better with up sampling etc.Dfhalyecko has a point about synergy between that Mac player but many have good op-amp for direct digital or analogue connection.Gert cables and tube traps or other room treatments to correct hard/soft component sound or room reflection problems.Frosting on finished cake.
Chazzbo