Help me choose

Looking for input from those that have heard the NAD M28 and the ATI AT-527NC right now I’m using an Emotiva XPA-7 gen 3 amplifier and want to upgrade my amp. Even though this is for a home theater setup 90% of listening is music. I use a Marantz 8805 pre pro my speakers are Dunlavy Aletha’s all power cord’s and speaker cables and interconnects are audio envy. CD player is Stan Warren modified pioneer elite. Blu-ray is oppo 105. Steaming using solid state computer thru hdmi. I’m getting decent sound but I feel the weak link is my amp. Unable to audition the NAD or Ati locally any opinions about the 2 amps appreciated.