I am wondering what amp to buy for my home theater? I have KLF 20's for fronts, KLF C-7 for the center, and the 2.1 for rear's. I am eventually going to purchase another pair of the KLF 20's or 10's for the rears. What kind of amp should I purchase and how many watts should I push? I don't want to spend a ton of money on a amp, just wondering if anyone knew of a reasonable amp I could buy.