I'd go with the Rick's tank, I've seen a lot of cars using them in the forum, and, well, they're a lot more discrete than a fuel cell, and unless you're going to just race it, well, the tank is more for street use and show. more pleasant to the eye. So, your choice, personally I don't like fuel cells.
GIMME FUEL GIMME FIRE GIMME THAT WHICH I DESIRE! UUH!