Inexpensive 2 channel in-wall for front? Polk?

Well, the decision has been made for me, NO soundbar and NO hanging speakers. I have the OK for 2 in-wall's and a sub. My thoughts so far are either RC85,RC65 or RC55 and a 8 or 10 inch subwoofer. My budget for speakers is $500.00 including tax, license and drive off fee's :)

Recommendations would be appreciated for this 2.1 system.