I have had a bunch of subs but have never heard of AudioQue either. I am not really into car subs though so that is probably were they butter there bread.
For $250 there are a lot of other choices. I like Mike P's choice of the IXL-18 or you could go with dual 12" subs in the Shiva-X for only $50 more than the single AQ. There on sale now so you might want to snap up a couple before the sale is over.
I don't think you'll find to many people on this forum that would argue against 2 or more subs. Multiple subs are usually always better and in a ported alignment 1 EP2500 should be more than enough.
For $250 there are a lot of other choices. I like Mike P's choice of the IXL-18 or you could go with dual 12" subs in the Shiva-X for only $50 more than the single AQ. There on sale now so you might want to snap up a couple before the sale is over.
I don't think you'll find to many people on this forum that would argue against 2 or more subs. Multiple subs are usually always better and in a ported alignment 1 EP2500 should be more than enough.