I started with a AZTEK A470 and Testors AC200 compressor. They were okay to start with, but a friend told me look into the IWATA stuff. I ended up buying a Eclipse HP-SBS(the side feed version) and Smartjet compressor. Man, you could not believe the diffrence! Fine lines are sooo much easier and the action so much smoother. I have less splattering problems aswell! While the AC200 is a nice little compressor it's kind of noisy and I had moisture problems even with a trap. The smartjet is SILENT better airflow and no moisture problems at all! I liked the stuff so much I just got the Custom Micron-SB. I like the side feed configuration because it lets you see the tip of the airbrush for extra fine detailing. IMO spend the extra cash, these will probaly last forever and the diffrence between the Testors and Iwata has to be seen to be belived.
Here's a pic of my tools