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
Chazzbo