LOL, well, here we are at the cross roads of personal preference again scott!!
as far as cleaning goes, a while back i owned a VL and i remember the pain in the rear it was to clean the obtuse angle from the siphon tube to the main body of the airbrush. i did alot of T-shirt spraying and would run the appropriate thinner throught the brush, and when i broke it down after a month or so of use, i'd always get a big clump of paint right in the backside of the angle part, and it was a pain to get completly scrubbed out. with the gravity feed, you pop off the aircap, take out the tip, and you got a straight shot right to the color cup and you can see your paint cavity very plainly. thats what i like about a gravity feed, the paint only travels a very minimal distance to the exit. with a siphon, the paint has a little further to travel(more waste). then, when you hook up the thinner bottle, you always had that annoying left over paint that gets all over the rim of the thinner cup, so you have to stop and wipe this off. or, if you are using the metal cup, you have to clean out the long tube that goes from the bottom of the cup to the airbrush, and the cup itself. i don't know, i may be a little wierd, but all of that is just annoying to me.
thats funny, for me, i've never considered the cup atop the airbrush as bulky. i am able to manuever the top mounted cup into places i couldn't get my siphon into, ie, wing root areas are a problem for me. shadows? i've never noticed this either.
didn't mean to offend anybody here, the fella ask for pros and cons, and i listed the pros and cons of my experiences with both models. if you like siphon feeds, go on wid yo bad seff!!
later.