Spurdog,
I would highly recommend the 200. I bought one for Christmas and love it! The smoothness of the paint is amazing.
I advocate acrylic paints and just to lend some ideas for using them, if you already use them hopefully you can get more from my notes.
First and foremost I buy the craft paints found at most craft stores and have been using them for about twenty years and find them to be not only very inexpensive, under $1.00 for 4 oz. but also very user friendy in that they can be thinned with blue windshield wiper fluid, which does not tint the colors and they are easily airbrushed from this mix.
Next, the drying stage of airbrushing should take effect when the paint first hits the surface of the model, this is accomplished by the fact that the alcohol in the wiper fluid dries the paint almost instantly. This is the most desirable feature, using a hair dryer to complete the drying process. Set the dryer on LOW heat and go back and forth alnong the model. This acts like a poor-man's paint drying booth and will set the paint which will take decals and other finished very nicely.
Just some ideas to hopefully enhance your model building enjoyment.
johncpo