Enclosure suggestions?

Im putting a system in a 96 chevy s-10 blazer.  Whats the best box for being inside the vehicle, rather than in the trunk?  Sealed? Tuned ported? Transmission line?  Bandpass??  Etc.?  Any suggestions??? I want a clean sound from the low to high bass with some good hard bump.  I'm gonna FG a custom fitted box so my options are wide open.Donnie

If you want any kinda sq than both transmission line and bandass are out. If you are gonna fiberglass than I would suggest probally doing a sealed box over a ported box, although that is a very loose opinion being that you didnt state what kinda amp, and sub you are using or what kinda music you listen to. If you give me that info I may change my mind, I may not though to.double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer

i may sound stupid but what do you mean "sq"?  I have a m/a hc2502 (high current 2500w rms 0.5 ohm stable mono, 1 ohm stable stereo amp and 2 volfenhag DVX 10's (500w rms each; hooked up at 2 ohm stereo).  I listen to a some rap, mostly rock, depends on my mood though.  I like it loud though.  I know a guy here that holds the GA state outlaw record with one 12 in a transmission line box.  Its a Audiobahn high excursion with a us400 amp.  I know a transmission line will be huge but will it hit harder??Donnie