Home Theater Receiver recommendations for B&W 803S?

Hi!  I'm on the hunt for a new receiver, since I recently upgraded my main speakers, and I'd like to have one that also passes 4K signal.  

My current setup:

Denon AVR-4308CI
Left & Right: B&W 803S
Center: B&W HTM2
Surrounds B&W 301
Sub: Energy 8"

I recently upgraded to the 803S's on the left/right; replacing my original Nautilus 805's.  Now I need to upgrade the rest of the system!

I think the first step is the receiver, especially since I'd like to be able to pass 4K to my projector.   Then will likely upgrade the sub (Am considering the Monoprice Monolith, 10" or 12"...). And I'm also on the hunt for a HTM3S, to better match the 803S's. 

I'd love to know what Receiver recommendations folks have that will pair nicely with these speakers.  Ideally under ~$2K  - and I really don't care much about other bells & whistles (multi zone, bluetooth, wifi, whatever). I'd rather the money go into the best possible D/A, amplifiers, etc... and leave other tech gadgetry to other boxes.

Appreciate any/all input! Thanks!  :)