I think for under $300.00 you can get the DeVilbiss GFG-670, and it comes with 3 different size tips and rods, 1.3, 1.4, and 1.8, if I remember correctly. Before I paint my Vart this time, that's the gun I will be buying. From everything I've been able to determine, it will lay down clear like glass, and does a really good job with the basecoat or urethanes as well.
I get the $45.00 specials from any of the hardware places for spraying epoxy and hi-build primers. They usually come with a 1.4 and a 1.7 or 1.8 tip, and they lay down primer as good as anything.