I love Anthem. I had an AVM-2 for a long time. Even that was far superior to anything Yamaha had. You should consider a Sunfire IV or V or Sherbourne 7010/A also. Your amp and speakers are great. You need to determine if HDMI is necessary, some models can have it added on. If your TV is not HDMI and you don't plan to upgrade for a while, it will save you a lot.
AVM 20 or AVM 30 vs Mid-Fi Yamaha Receiver
I am currently running the pre/pro portion of my Yamaha RX-V659 Receiver with a Sunfire Cinema Grand II amp (5 x 225W) with 3 Von Schweikert LCR-15s across the front and VS T-150s as the rears. I am debating upgrading to an AVM 20 or 30 and wanted opinions as to whether or not it would be worth it based on the other equipment I currently have in the system.