Excellent choice on the Pioneer receiver. They get my highest stamp of approval
Also, if you find that you do NOT like the Polk which I hear are very good speakers and make a great match with the Pioneer, you may want to look at these guys:
SVSound - The Sound Authority
SVSound is a family business based out of Ohio and much like Oppo they cater to a discrete and discerning market with budget in mind. I picked up my 5.1 speakers from them including a subwoofer that is disturbingly profound. Their speakers combined with the Pioneer are truly shock and awe. It rivals most public theaters around me.
This is my theater just after we had the house built. The basement is 17.5' x 37'. Through the white door is a 350 sq-ft room and under stairs access.
* Pioneer VSX-1016TXV 7.1 Receiver
* SVSound SBS-01 5.1 w/PB10-NSD Subwoofer
* Mitsubishi HD1000U Projector
* EliteScreens 100" Cinewhite Fixed Frame
* Oppo DVD Player (Non Blue-Ray)
* DishNetwork DVR
* Logitech Harmony 880 Remote
About $3k total with HDMI cables, building the equipment rack into the wall, a Logitech Harmony remote, dimming lights and a plethora of other miscellaneous items.
Man Cave Panorama
I enjoy my play room every chance I get which is any time I'm not on the Wee-Strom. I hope you enjoy your setup and do let me know how your system comes together for you.