New Receiver needed?

[Aerodude73]

I should prob. PM "Big Daddy", "Crackinhedz", "Driver King", or "Aramis109", , as they've ALL been Extremely helpful and Patient, but I'll throw this out there and see what people think.

I have the Onkyo TX-SR505 7.1 AVR now, but I just won a CS10 Center (Ebay), and will prob. be ordering the T90e's & Monitor 30's from Newegg this Friday, to go along with my 2 new PSW-10's. Do I need a New (aka, "more powerful") AVR to go with the new speakers or will what I have suffice for now? Obv. we can Always upgrade, but with all this new stuff I won't have $$$$ for a short while at best. The RM6750 speakers I have now sound Fine and Adequate, and Can get Loud when I need it w/out losing any clarity.

A lot of readers here seem to be into the Onkyo's like myself, and since I can't spend a Lot of dough, ($350-500, maybe a bit more?) when the time is right, I want to have a couple routes to look at.

** (Heading off to work now, so when I get back at 10:20pm or so, hopefully I will have the usual Great advice, options, etc., to go thru - thx in advance!) **