I have a single ported box, 1.0 but it's for a 12" and I made an adapter ring for it and it works great.
I am getting a second clarion WQ2510D and I'm not sure how to box it.
I would like a simple addon of a sealed box because that would be the easiest IMO and would give me best of both worlds
Then if one fails I would still have bass.
I would also like to make a custom box that fits behind the rear seats so I have my cargo area back and there isn't just a sloppy box thrown in the back.
Pic is current sub and box. (click image for full size)