hifi engine

Someone please help me pick between two AV recievers

I own two yamaha recievers and i dont really need both. I own a Rx-v3000 and a rx-v557 they both are amazing but i really dont have a reason to keep both, unless Bi-amping them would be worth it. Otherwise can someone please help me pick one.

RX-V3000 or RX-V557

Stereos don't seem to be selling well these days--that is reason enough to keep them both.