buying an airbrush

hey im buying an airbrush pretty soon...dual action internal mix ect..i was looking at a kit on ebay..looks pretty decent..the brush isby paasche..dunno what the compressor is, but it is a full kit...anyone have any suggestions as to what's good and bad...i have used hobbyist airbrushes before, but i want to start pimping some of my artwork at local shows and try to make some money and build up a nice airbrush portfolio, so im just looking for a good quality product..