There's a bunch of well versed maggots around here. There's more, old, and grumpy ones on AO (soon to be the new AO server). Information should not be your problem.
When you think mag, think high pressure.
When you think RT or X-valve, always think air, not CO2.
The only dedicated paint chopping mags have a power feed with the old feed plug design (~$9). It's amazing what a little curve in a feed plug can do. Beyond that, you just need to keep it fed, and it will shoot more paint than you care to buy, for years to come.
Here's a fire hose, have drink. Automag questions