Good Shallow Subs and amp for them

 I was thinking of  two polk momo mm104 10" subs in a 2000 f-150 in a closed box with .7 cu ft of air space. I was thinking of a ppi pcx 480 which is 320x2 at 4 ohm. Is this a Good amp or would a two channel amp be better or a diffrent kind of 4 ch amp... Then again i am not really set on the momo subs either i just need some good subs that are pretty shallow with less than 6" of mount highth. Any Responce would be appreciated.

The momo subs have a max rms power of 500watts

Pioneer has some new subs that should be shipping in the next 2 weeks.  They are 4" deep and work in .6 to .9 cubic foot sealed enclosures.  Power handling on them is 300 rms with a peak of 1000

I have successfully put some Alpine type-E and type-S 10" subs under the seat in the new f-150's, The best way to make the box is by making the subs down fireing.2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.