I have 2 12" Pioneer Premiers Champion Series in a ported box, I currently have cheap Nitro amp 1200 installed atm. I want to buy a new amp and need suggestions on wattage, RMS, and ohms. These are the subs I have if you want the specs to better suggest a good amp. http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=17682 My budget is around 200 bucks maybe 300 if the amp is worth it.