HELP ME! I need a decent car for our US Honeymoon.

[Steve Gunnis]

My fiancee and I are going to the US on June 23rd for our Honeymoon, we're flying out to San Francisco and Flying back form Phoenix. We need a half decent car for the trip and I'm finding it impossible to get one. Hertz don't do the Shelby Mustang anymore, the Corvette is unavailable for that trip (It doesn't say why) and I have exhausted all the sites trying to find something interesting. MY fiancee is getting worried now that we haven't booked anything and just sent me a link to a Chevy Equinox, a fking SUV! Please help me, if you know any firms that will rent us a good car for our trip, I never imagined it would be this difficult.

I don't care what is any more as long as it's good to drive, I've been told convertibles aren't a good idea (We're driving through Death Valley in July - up to 55 degrees) but even an MX-5 would be better than a disgusting American Monster Truck.