I have owned the original UMC-1, the LMC-1, the LPA-1 amp and the XPA-5 amp during various times.
They are all gone now and I'm currently with a Pioneer AVR. (I have since downsized my system greatly with a smaller space now)
I'm in the market for a used 4311 (they are poping up everywhere now with the 4250 out) but honestly I'm in no rush.
I actually prefer two channel music with cans vs speakers so I'm seriously looking at getting a stax setup this year and may do that instead of the 4311 upgrade.
Movies are ok with my current setup.
It sounds like a nice setup I guess I'm going to wait to see what happens with this amp. The specs are great and by all accounts a good sounding amp.