So over the past couple weeks I've invested some money into my audio system I've bought 4 6x8 kicker comp door speakers and a 8" 8 ohm kicker comp for the rear encloser so the question I have is what amp should I use to run the 4 speakers and sub. Thanks

Links (clicky click)
http://www.bestbuy.com/site/Kicker+-+Competition+Series+8%22+Single-Voice-Coil+8-Ohm+Subwoofer/2304186.p?id=1218320076665&skuId=2304186

http://www.bestbuy.com/site/Kicker+-+KS+6%22+x+8%22+2-Way+Car+Speakers+with+Polypropylene+Cones+(Pair)/1671453.p?id=1218278290638&skuId=1671453

All depends how loud you want it. But really I don't know on sub amp, aren't most mono block amps 4 ohm?

I was thinking a 4 ohm six channel amp.. But I want it to sound nice and not too loud to where it's deafening and can't stand it but to still make someone say " wow.. Damn"