Originally posted by LanEvo
If you're worried, just take a couple of large (empty!) cardboard boxes with you when you go car shopping. You can fold them up and stick them in the trunk. That way, you can get some idea of how your rig will fit.
Emre
Or go one better (like my drummer did). Tell the salesperson you won't buy the car unless you can fit your gear into it. Then test drive it home and load it up. At least you'll know for sure.