I have the Asturo stainless steel gun from Spray Gun World. I've primarily used it on turned pieces, but it has performed flawlessly with wood dyes (in water or DNA solutions) and waterborne lacquer.
I saw lots of positive feedback regarding the Harbor Freight mini HVLP gun on the hot rodder forums when I was researching HVLP guns a few years back. Lot less money than the Asturo.