Welcome.

Does your Yamaha have pre-outs, or are you looking for a new receiver?

Do you listen at high volumes?

Is this a two-channel system or multi-channel?

Most people think competently engineered solid-state amps sound indistinguishable.

It seems pretty unlikely to me that you're going to hear a noticeable difference unless you go to tubes or listen at fairly high volumes.

That being said, it's fun to buy new stuff smile

Have fun.

bibere usque ad hilaritatem