What Enclosure for PSW812E???

I have a 2008 toyota tacoma access cab. I have limited space and want some good quality hard hitting bass out of my 12" 4 ohm 1000 watt RMS alphasonik sub. And i also havent decided on what amp to go with i want something that wont break the bank right now but not junk. Thanks in advance guys i appreciate the help. oh and i have only had sealed boxes and liked them but dont have the stuff to build ported.

If you can build sealed then you can build ported if you can get a design.

i cant build anything i just want to buy a box(unless it was going to be a huge difference then i could find someone with the tools and knowhow) but i would like to know how many cubic feet i would be looking for in a sealed enlosure