I have a Sharpe Cobalt 1.4 tip that I use for my base and clear. My old Binks #7 is now used for primers. I haven't had any problems with the Sharpe gun, and am very pleased with it. I think it's a good gun for the money, but that's just my opinion.
I bought a $13 HVLP gun from China Freight (don't normally buy from then, but was in a bind). Once I got the air pressures and paint thickness figured out, it layed down better then the paint is on my 03 Neon.