New Setup

I just bought a house and get to finally set up my system correctly. So I want to run it by you guys and get some suggestions.


Equipment:


Direct TV with TIVO

32" Sony TV, with s-video, no component. (This is going to be replaced with a bigger better soon.)

Pioneer VSX-912k (on order be here soon)

Panasonic 5-disc progressive scan DVD


I am going to do 7.1, my room is 20x12.


2 Polk R30's

4 Polk RT15i's

1 CSi30

Aiwa sub (to be replaced)


So, I am doing this myself, with help from friends. I need suggestion on places online to get speaker cable, wall outlets, and other cables. I am not opposed to making my own AV cable if necessary.


Also, I want to do a 2 sub setup, one in opposing corners of the room, can I do this without an amp?


Thanks.