Youth Inside

Sublime Chick asked:

I am buying a stereo system for my car. So, If I buy one 1000 watt Sub, then do I need 1000 watt amp or less wattage??

And If I buy 2 1000 watt Subs, then can I still use a 1000 watt amplifier??

Also, What sounds the best, 2 10 inch subs, or one 12 inch 1000 watt??

Thank you!!

(Once I know I will go to ebay right now and buy, I need to know what wattage and stuff)