Dual 2 Ohm, the amp will be cheaper, and you have either a 1 or 4 ohm wiring option. Here is my amp: http://www.caraudiodeals.com/hifonics-bxi1610d-p-1980.html
I have no complaints, just run it on a 4 ohm load and you will be golden.
~NOTE~ This information was provided for the 12" Kicker L5. Please feel free to email or message me on Yahoo if you have any questions.