With my setup I use a 7.1 Canton CD1 and CD50s as fronts and center, and I use 4 ohms with my DA1200ES reciever.
I mostly use that cable with peoples setups now as it was recommend to me by an AV pro on AVForums. Its a quality cable for the price, although bear in mind its pretty thick to run behind skirting etc.
2 core power flex is what I use. Cheap and you are not going to achieve much better should for expensive audio cable. Its insulated very well as its kind of important. I got this info from a guy who used to do serious AV installs 50k plus systems. But for normal home use its fine.
I had to 'borrow' quality speaker cable for my HT, so i took it from our existing 5CD stereo player. The wife was now saddened that she can't play her CDs, so i purchased 5m of doorbell wire, for a £1....now everyone is happy :Laugh::Jester: