I bought a Devilbiss SGK 600BV because I wanted a good gun I only had to buy once, it gets great reviews and uses a little bit less air than other hvlp. you'll still need a decent air supply though. the gun works beautifully. I painted my car with it. etch primer, hi build primer, ground and base coats and 2 pack clear, all from one gun. comes with a 1.5mm (i think) air cap but youcan buy a 2mm cap for sspraying high build. I just thinned it down a bit. the pot is plastic and holds more than enough to paint a whole motorbike in one go. very nice gun indeed and cost less than $200 new on fleabay.
painted my Savage with a $15 touchup gun from ebay though, and it turned out fine, too.