What to pair with TL2600 5.1 set

unclebump2008

I have a TL2600 set arriving tomorrow. Got them from Amazon for $499. What could I pair with them to make a 7.1 system? two more TL2's or some towers, or small bookshelf? I have an Onkyo TX-SR608, but I am looking at upgrading to the Yamaha RX-A701BL Or maybe a Denon. Towers will probably be used as front, and the TL250's will be front high and surrounds. My couch is located back against the far wall, so I don't think rear surrounds are an option. Newegg has some Polk deals until the 7th. Thanks for your thoughts.