Need More Suggestions

[Jwknow]

Hi guys & gals.
Yesterday I asked about my purchasing a Sony s550 & how it would work with my existing Sony antique fx80. Great advice.
Still getting the 550. After reading all the feedback, I'd really like to get the Onkyo 606 (read a lot of good stuff about this unit)& new speakers but that's going to put me way over the top. Is there a set up out there that will keep me under$750.00 total? (including the Sony) Is the 506 worth looking at for around $220? If so, how about speakers?

Thanks. Look forward to lots more input.