I got the husky pro one from home depot.
Really just because I was itching to paint one day and it was the only option for an impulse purchase. Think it was around $100
I was nervous that I should be spending a little more on a gun - but it's painted a tractor, implements, hammer mill, truck panel, and a few odds and ends. I'm happy with the results.
First time painting with anything but a brush or rattle can so I can't compare it to anything.
But - no regrets.