IMO, the $100-$250 price range is pretty dodgy, I dont think you get that nicer finish compared to the extra cost over a $50 gun, and they are miles off the finish from a $300+ gun.
When it comes time to paint something over here I'm going to buy an Iwata w400 off eBay, they work great and at ~$300 they are hard to beat. They are what I used to spray the alfa and the lotus, and neither of them got any colour sanding and the paint looks mint straight off the gun.