For my musical tastes (mostly rock, some pop) the sub sounds awesome in that box! If you listen to mostly hip hop, you'll probably a little disappointed in the bottom end. That said, my previous setup when I had a car was two 12" subs so that's what my comparison is to. Obviously the 12's could go lower than a single 10. This box is just the right size for the sub based on eD's specs. I did stuff it full of polyfill just to make sure it would act right.
I had an Infinity sub prior to the eD, and the eD blows the Infinity out of the water in terms of sound quality and the ability to go low. I'm pushing it with about 650W, so I'm getting everything possible out of it. I'd love to be able to use the something from their ov line to go even louder and deeper, but there's just not enough mounting depth. I'm contemplating doing a setup with an eD 12" sub somewhere down the line.
If you haven't yet, you should check out the Tacoma forum over at toyotanation.com. There's a huge audio thread over there and several people have done a setup like you're talking about doing. The only issue seems to be mounting the amp without taking out the carseat hook(s). For me, I couldn't remove the hooks because I have one kid now and plans for another one.
Good luck!