I am looking for a little bit of advice/guidance. Oh yeah......Hello all. I am new to posting here, but not to the site. Thanks for any input in advance.
I have a pair of Polk Rti70's and a Pioneer VSX-D812. I have had this set-up ( if you can call it that) for 6 or 7 years. I had always thought that one day I would have a killer system that I had pieced together, but funding has been an issue. So here is my pickle...Not literally

I am in position to add on/upgrade. Would I be better of trying to add to what I have(like a sub and new receiver, for now) or getting a something like The HSU Ventrilioquist or Take Energy Classic 5.1? Do I need a new receiver no matter what I do?
Did I mention that we are FINALLY getting with the program and getting a Flat Screen TV. Toshiba 40" LCD. That is why am curious about the reciever.

Any and all suggestions are appreciated. Thanks for having me.

Zeb