I've been looking into buying an airbrush to start practicing with, and was wondering which type would be preferable to purchase, or if there's much of a difference.

So there's the gravity-fed type with the cup on top (or on the side or bottom), and the siphon-fed which has the bottles.. Are there specific uses for each type, and pros and cons to each? I would assume the bottles would allow you to hold more liquid...

Also, when it comes to paint (I've been searching the threads to see what veryone recommends for brands), do you have to dilute paints down, or use them as-is? I'm talking about for paints, such as the Endura line? Just curious... I plan on just playing around with cheap watered down acrylic paints to get the hang of it for now.