All the gentlemen above have made very sound recommendations on mainly speakers which all seem very constructive.
Regarding the home theater processor, I own an Anthem AVM70 and have it pared with Revel speakers and am very content. The Anthem piece has very many features like bass management for 2 subs and Anthems state of the Art Arc Genesis room correction system, that many seem to believe is the best in the business including the excellent Dirac system. The DAC in the AVM 70 are extremely good musically, I use them for my Bluenode streamer in a DaC out config. That said as good as the Anthem AVM 70 is, there are only two pieces better for home theater processor the best probably being the Trinoff and second place Anthems AVM90. I haven’t heard the Trinoff but people like Audio Advice says it’s the best on the market. The AVM 90 have even better DACs than the AVM 70 and has bass management for up to 4 subs. Last week Audio Advice was offering a 20% off on the Anthem gear.
Good luck with the upgrade and please let all of us know when you make changes and the progress resulting.