sub choice for a standard cab pickup

I am looking to get a sub or subs in my 96 nissan hardbody. Really there is not a lot of room in there and I was wondering what choice would be better for the truck (more SPL than SQ) 2 6" subs, I had the JL 6w0s in mind or one of those shallow mount 10" subs. I havent really looked into the shallow mount subs but saw JL is coming out with them for 07. I still cant find them anywhere to buy so I would be open for suggestions on the shallow mount. Thanks! Oh and the amp I have is an MTX 251D.

  the pioneers shallow mount subs sound pretty good, but they aren't necessarily an 'spl' subwoofer.  i've done a few pairs of 12's last year and they all sounded plenty loud.  they just came out with 10's and 8's too, but i haven't heard them.  i think earthquake makes a nice shallow sub too. the jl one will (from what i hear) be the slimmest in depth. (4)g5-1244, (4)gtr12, (2)ppipcx2400, (1)pcx4125, (1)pc4800.2, (3) pair mb quart 6.5"Q, (4)optimas, alumapro (1)5 and(1)15 farad cap, premier deh-p860mp, pioneer xm -dual H.O. alternators