The exile is nice if your running 2 of them, but for just 1 sub I will go for the gcon or a psi platform 1, get at least a 3 inch voice coil and a dvc 2 so you can wire it to 1ohm. Try not to get a 600 watt sub, even though people use 1k on them a 750watt sub will still be a better match for your amp
