Being you are not really using a lot of air while airbrushing having any tank compressor is a plus, When I am painting something large like a basepainting a car I use my shop compressor, but when it is time to airbrush I just use the small one. Mainly picking a compressor depends on where you are going to use it. Inside your house you would not really want one that can wake the dead LOL out in a detached garage then it is mainly up to how high you will jump when it kicks on LOL But now last word of advice even with water based paint wear a mask protect your lungs , While the over spray from an airbrush is very little it will find it way in your nose and you still can end up with rainbow lungs.I almost bought that one today, saw a two gallon one for $140. Decided I'd go for the CAT as it has 5.5 gallons and a bit more cfm for only $20 more.