Help Me Choose Better 5-Channel Amp

Our home theater has evolved from a home theater only into a hybrid HT/2-channel system. Both the HT and the 2-channel perform very well and overall I am very pleased with the outcome. But I would like to improve what I perceive to be the weak link when it comes to 2-channel listening. Right now I am using an Anthem Statement A5, a good match for the Anthem AVM50 and great for HT sound. But when I listen to 2-channel, I believe the sound could be improved with a better amp. I would prefer to upgrade the amp rather than buy a separate 2-channel amp and switch back and forth. When listening to 2-channel in this system, the other components are the Well Tempered Amadeus TT with a Dynavector XX2 LOMC cartridge, Levinson 390S CDP, Audio Research PH7 phono stage, Audio Research Ref 3 preamp, and Verity Fidelio Encore speakers. ICs are Aud23 and the speaker cable is Chord's Epic Twin.

Any suggestions for a better 5-channel amp that will improve the 2-channel listening experience?