There are other options.
GM talked about fuel cells in 2002. In 2004, they now have a working model.

I presume they will be able to scale them up to monster power. Invest in hydrogen!

Then there's the other end. Invest in air!
http://www.theaircar.com/
A solar powered air compressor would be a Moab essential--and replace the sun-roof with a solar roof. Speaking of which, there's always electric cars, though unless there's another option to the hydrogen fuel cell, battery power density seems to have hit a fixed limit.

Either way, the chief complaint/drawback to larger vehicles seems to be how much fuel they use. If we get a less expensive and reliable alternate power source for vehicles, expect *MORE* suv's, not less.

I'd love a turbo-diesel hybid or turbo-diesel fuel-cell engine and would plop an extra 1k down for it. 2k is pushing it, unless it has a high reliability (which it should since you always operate the mechanical engine at it's peak efficiency point instead of spooling up and down like a regular engine).