First
to the forums! Pull up a keyboard and stay a while.
Second, respectfully speaking but who ever told you nobody uses airbrushes anymore is a moron. While computers definitely have become the tool of choice for many graphic designers, artists still use 'em, and use 'em well. I would like to know how a body artist, one-off Tshirt artist, motorcycle helmut and tank artist is supposed to work on a computer for their finished products. I work in printing and have seen some amazing computer art in my time. I have yet to see something that has surpassed art created by hand. Hell, I know artists that use a technical pen for pointalism. Who uses those anymore? Lots of artists, that's who.
I suggest avoiding these so-called tutors in the future.
I've never used a 360, nor the Iwata products. But I do know some old time graphic illustrators who will never give up their Badger 150 for all around illustration use, from photo re-touching, to photo-realism, to spraying a camo on a 1:48 Bf 109. So that's what I use. In fact, my first AB was a gift from one, and is well over 20 years old. I liked it so much that I bought a new one, just so I didn't have to keep switching needles and head assemblies.
My belief is that while a siphon feed won't be able to spray as fine a line as a fine tipped gravity fed brush, it comes pretty darn close, and can hold a much larger amount of ink and paint. Something a large format artist would appreciate. You can also attach a 1/4 oz color cup for those tiny amounts of spray media. My next airbrush will be the Badger 100G, which shares parts with my trusty 150s, so I can get better with those thin squiggle camos the luftwaffe uses to confound me.