I use a Badger Patriot 105 and I'm pretty happy with it, though if I had to do it over again I think I'd go for the Iwata Eclipse instead. The Iwata seems a little nicer overall: better build, fit and finish plus has a nice protective shroud on the tip of the needle. I haven't bent mine yet, but without the shroud it just feels like a matter of time
I've never had a problem running out of paint from the gravity-feed cup (it's pretty easy to add when running low), but haven't ever bulk-painted a squadron of vehicles. Honestly, I think you'd be fine with just a gravity feed one but if you're planning on doing a lot of big stuff all at once maybe not.