I think if I'm going to do it I will take the plunge. I've been reading over on autobody101.com.
The Fuji Q-5 5 stage turbine, although I'm still undecided on the guns.

Thing is, everytime I look into this, I get sidetracked by looking at big air compressors, which I also need.
In theory I could shoot pretty much anything the car needed with the Fuji turbine.