I'd go with Option #4 - Corbeau. I'd look into getting two seats to fit in the back as well........plus side to this includes: cool factor, space inbetween the two back seats that you could custom build a sub box, headrests for the rear passengers, and oh, did I say cool factor????

Jonnie

98 Zetec Contour SE Sony XPlod CDX-CA900X HU Sony XPlod XM-2150GSX amp with JBL 8" Sub (Not much so far but workin' on it)