you know, i was looking at Infinity Kappa 12"s, not the Perfects they don't fit. They aren't really shallow mount, but their depth is 5" which will fit in my box. My main problem isn't mounting depth for most subs it is recommended box volume. Kicker CVT's will fit, but they need a big box which doesn' t make a lot of sense considering most people with a big box have plenty of depth anyway.
The Kappas are rated at .7-1.3. My box is going to be around .6, but I figure they will probably still sound better than any of the true shallow mount subs that are between 3 and 4 inches deep