If I had the money to drop on a new car it would be a brushless system. From what I've read its alot less hassle. Gas and glow plugs get really expensive. You can burn 15 bucks of fuel in one day if it runs long enough.
It is really fun playing with the motor, but starters going out, having to keep your starter wand charged, its just a big hassle. It would be nice to have a couple LiPo batterys and swap them out when you need to.