best 10 for small sealed box

I do not know much about Audiobahn, but why don't you try a audiobahn sub.  I heard some Kicker Comp Vr sub's in that same enclousure and it played very well.  They were powered by a 400 watt amp(I do not remember the brand)  I know that JL Audio does not require a lot of air space and also Image Dynamics.

I don't know about your budget but try "infinity kappa perfect 10.1" 

If you get 400 RMS each from your amp (4-channel, bridged) they're actually perfect, got a pair a couple of weeks ago <amazing>. They could even accomadate .3 cu ft each, though mine are .75 w/mid insert

Unless you intend to have the box ported, 1 cu. ft. per sub for 10" subs is actually more like a large sealed box, and you will have a fairly difficult time finding a sub whose optimal sealed enclosure volume is 1 cu. ft.

Usually the problem is the other way around (i.e. you need a box bigger than what yours is) and this kind of problem can often be decreased or maybe even eliminated by adding some fiberfill to the inside of the box.  I don't know of any way to make the box smaller except adding more boards to the inside and then re-sealing the seams of the enclosure.

The Kappa Perfects are sweet subs and I've always loved them ever since they came out a couple years ago.  The VQ ones are particularly cool cuz you can adjust them for different enclosure sizes.  They will work in a 1 cu. ft. enclosure but it's not the optimum size recommended by Infinity.  They recommend 0.75 cu. ft..

The older Kappa Perfects (not the VQ series) will work perfectly in a 1 cu. ft. ported box but require a much smaller sealed box (0.6 cu. ft.) than what your enclosure is.

I forgot to ask you the most important question.....how much do you want to spend on these subs?

I would suggest Diamond Audio M6's ( http://www.diamondaudio.com/MobileAudio/index.cfm?page=Subwoofers#