JL Audio 6W3v3's or 8W3v3's . . .

is anyone out there running these subs in their Double Cab Taco's? I realize that they are on the small side as far as subs go, but I was wondering if anyone was running them and if they had any feedback on their performance? I'm not sure if their mounting depth would be a constraint or not, considering that I would still need the back seat to be fully functional (less the storage bins of course). I imagine you could fit one 8 or 2 6's back there no problem, but which do you think would be the better option?

I'm not looking for a high SPL type system, but more SQ biased. It looks like it would be a fair bit less expensive to go this route as opposed to a 13TW5 and I was also thinking that these subs may offer better SQ than a single 10 or 12 in one of JL's other less expesnive lines. Any thoughts on how either of these would perform in a Double Cab?

Thanks in advance for any thoughts you may have!