2.2 Channel System Processor Suggestions

The Martin Logan 1100X subs have a balanced input so it would be kind of silly to use them with unbalanced cables or with their wireless option.

Have you listened with your subs using an RCA or wireless connection?  Unless you have really long runs, I doubt you'd hear a difference.

I have not done a balanced and unbalance comparison with the subs yet however I do know that I will be moving in the next year and that could change the current layout of my system. To prevent buyers remorse I would at the very least like the option of having balanced connections.

The Classe Sigma 2200i is a integrated amp with HDMI inputs and a subwoofer crossover. It has one subwoofer output, so you'd have to use a Y-splitter cable.

I bought one of these new. Waiting on delivery. They are being very heavily discounted if you google it.

I’m a fan of using a quality stereo pre too and frequently advocate pairing a good stereo pre with a cheaper AVR to handle processing. But in your situation you’re looking for better quality processing and balanced outputs, so you’re gonna have to pay up on the processing side, and adding a good stereo pre on top of that would get very expensive. I think a good prepro is your best bet, and if you get the itch down the road you can try plugging in a good stereo preamp to see what improvements may be had.

As as far as prepros, along with the AVM60 there’s the Marantz 7705. If you want more neutral and detailed sound go with the Anthem and if you want warmer sound and are willing to sacrifice some detail choose the Marantz. IMO the processing advantage goes to the Anthem, but as you run 2.2 I’m not sure how much of a difference this will make. Best of luck.