i have an omni 5000 and i love it. its not the best for broad coverage so im thinking of buy a paashe vl just for the broad coverage thing. i had a vl about 15 yrs ago and loved it because it was all i had. i painted a many of t-shirts, murals, and bed sheets with that airbrush and never had much trouble out of it. (i used bed sheets to practice on fellows ok). if you buy one, here is an excellent place to start looking.....http://www.dixieart.com/PaascheVL.html
also, to clean a vl is kind of difficult so i recommend these handy little boogers......
http://www.dixieart.com/Accessories.html#anchor305383
you have to scroll down about half way on that last link. im talking about the $22 set if brushes. well worth the money! you can reach every crook and cranny.
if you have the money (and im not talking about a whole lot more than a siphon feed), and modelling is your preference, buy a double action gravity feed if possible. they are excellent all-around brushes. you can get decent broad coverage, but you can get excellent detail at a low psi (8 to 12 psi). and lower psi means little if any overspray.