I highly doubt you'll fit a snailshell in the back of your S10, unless you do a cut through. My friend bought a SS box loaded with a 12" Brahma from P4S and had a Rockford BD1500 or something running to it, and well, let me tell you that this thing amazed me. Not only does this thing hit hard to your whole body, but it is so very clean. He has it in an RSX, so maybe he has an advantage over my 12W7, plus I only have 750W going to it (stupid 3ohm bs) but I had two e15K's and 1000W going to them ported and his was almost as loud as my 15's, and it totally blew them away in SQ.
SS's are made for SQ, while keeping the SPL high, not for competitions though. The SS takes up his whole trunk in his RSX, and I am sure he has more room than the S10, so unless they customly build it for you to the sizes of your truck (will probably cost even more money) then I don't think you'll be able to fit their real SS box back there.
Overall, I was impressed with the box, VERY impressed, however, I would never shell out $200-$300 for just a box. I am sure if I put 1500W to my W7, I'd be able to compete with the Brahma/SS combo. Plus, his is a lot smaller car (RSX vs my Blazer)
Just my two cents. Good luck!