Hi, Goose -
I've been airbrushing for right around 50 years, tried just about every brand, Paasche, Badger, Iwata, T&C, Testors, Binks, etc. For most of the time I used siphon feed, went to gravity just a few years back, clearly the best choice for me, by a big margin.
I still have and sometimes use my old Badger 200 siphons, but quite seldom when compared with my use of gravity feeds. The gravity advantages for me are, 1) Ease of handling, 2) Fast, but still thorough cleanup, 3) A quick thinner rinse between cups is a simple procedure.
I had the Paasche Talon gravity feed, but found the large cup size to be ungainly and less than handy for seeing my spray work while painting.
Presently my two main brushes are a Badger 100G, (small cup,) and badger 200G, (single action,) both gravity feed. I estimate they serve 85-90% of my airbrush use. For larger surface area jobs, (like a solid color base coat,) the old Badger 200 with metal cup works more than adequately, I still rate it as an excellent airbrush.
The smaller cup sizes are not a handicap for me, since I habitually run the thinner rinse through it between cup refills, (haven't had a clog in a very long time.) Also, I find a properly thinned paint will cover a surprisingly large surface area.
Maybe this will best express my preference of types, after many years of LOT'S of model spraying. If I could only have one airbrush for all the rest of my painting needs, it would hands down be the Badger 100G. Best all around I've ever tried. No doubt that wouldn't work best for everyone, as personal preferences do dictate selections and there are certainly many excellent choices out there.
If you have yet to check out Don's airbrush website, I highly recommend it. He's a great guy with considerable insight regarding airbrushes, plus he'll answer questions willingly and in detail. He was most helpful when I visited his site, I wish it had been around a long time ago, I would have far fewer airbrushes in my inventory today.
Best of luck with your search.
Patrick