In regard to the questions.
Both marissa and airbrushtutor use a cm-sb (though marissa has a "pimped" version). For illustration work marissa uses E'tac (marissa paint is E'tac changed a bit to suit her purpose). I'm not sure which paint airbrushtutor is curently using
. For "fine art" I'd advice either E'tac or createx Illustration, these are most often used for that kind of work (paint is very pesonal though and oppinions will differ
)
I myself at the moment am down to using just 2 guns, CM-SB for detail work and a Iwata revolution BCR. The BCR is bottom fed and can do some reasonable detail eventhough it's a 0,5
There's been a few (ok more than a few
) topics on the micron. Besides it's excelent performance one of the main selling points of the cm-sb for me is the you can use more cups and easily switch between paints (I have one filled with water, quick spray through and get another color in another cup). the cups are a tad expensive, but monies where no concern
(there are plastic cups avaliable which are a lot cheaper and also work fine).
Another nice thing compared to a gravity feed is you can change the angle of the cup (I wok a lot on bikes and with that you just can't get around having to paint at angles which would be very hard with a gravity feed)
As to the + version, you can also get a quickrelease with an air regulator (mac-valve). I find this more convinient as that way you automaticly have one on all your brushes.