I bought my Axiom 7.1 speaker set about 10 or 11 years ago, and we were blown away at the quality of the sound and how good our home theater sounds.

We're moving the home theater out of the basement and into a new great room we've built. It's a much larger room 23' by 16' with vaulted ceiling that goes 14' high at the center peak.

I have about $7000 put aside to upgrade the theater system, but that includes buying a new receiver and new 75" TV.

Our current speaker setup is:
Subwoofer EP350 v2
Center: VP100 v2
Towers: M50 v2
Surrounds: QS4 v2 (4)

Yes, it's mostly the base level Axiom speakers, but really does still sound absolutely great even after 10 years.

So, for this upgrade I was thinking an additional:

4 Ceiling Speakers: M3 $996
Subwoofer: EP350 $890
Receiver: Denon AVRX6300H 11.2 Channel: $2200
TV: Samsung UN75JU6500 75-Inch: $2300

Total of that is around $6400.

That leaves me around $600.. so a new center maybe?

I"m curious what advice or thoughts all of you might have on pulling off this 7.1 to 11.2 upgrade for a budget of around $7000. Are these the decisions you'd make on this budget?

I've read some reviews on Amazon that the Denon 11.2 receiver might have feedback on more sensitive speakers. Our old Denon 7.1 worked great for 11+ years, so I like Denon, but I'd also consider a different brand if that's truly the case.