What subs should I use?

[cargodz]

Looks like the R/T boxes for 10"s are either 6.5" or 7.5" deep... I'm going to assume you have the 7.5" since you have a quad cab larger area and most don't carry the 6.5" version.

So with that said you're gonna be looking for a sub(s) that will perform well in a small enclosure with less than 7" mounting depth optimum

Now I'm gonna throw you a couple more options:
Massive Audio RW10 5.5" mounting depth optimum sealed .75 cu.ft. 400wrms handling
Cerwin Vega HED10.4 mounting depth 5.62" optimum sealed .75- 1.0 cu. ft. 250-300wrms handling
Just food for thought :)