I know its a pretty newbie questions but seeing as i will be putting the cable in this week before they put up the drywall in my basement i thought i should ask.

Stuff:
onkyo tx-sr600 reciever
ecpi 50 speaker set

My questions is, what type of speaker cable is needed for the connections i'm going to have. I will be running 3 lines to the back of my seating area 2 surrounds and 1 rear center. What type of cable should i have for those 3? and should i go with something better for the front 3 speakers?
I want it to sound as good as possible and i don't really want to spend $200 per speaker connection. Any idea's?

thanks!
Ayien