If budget is a concern, I'm surprised no one has suggested an icon and SCV 1500, then you would have money left to make sure your electrical is where it needs to be for the "let 'er rip" moments. If you are trying to run a 2000 watt amp, you need to be factoring in electrical upgrades to your budget. "A lot of watts even if I can't feed it properly" is a recipe for disaster. With that being said, the 4" coil probably isn't in your best interest at the moment. Sure it will take major abuse, but it will also take more power to get it moving. At the power level you are talking about here, a 3" coil will be just fine.