You don't need another airbrush, you need to get smaller tips and needles for your vl. I have a paasche vsr90 which uses the same needles and tips as vl series. Get a .2 and .3 needle and tip and you are all set.
Before buying more airbrushes, master the ones you have so you can then make an informed purchase next time. I built a 1/48 b-29 with 3 ft wing span and never went over a .3 size.