I-beam, propertly thinned, the spray pattern with my Peak is nice and tight with very, very little over spray.
Here is the way I see it. If money is a little tight, and you want a Iwata quality airbrush then the Peak is the way to go. Especially when you consider replacement parts for the Iwata, very expensive. But now that I have my Peak, I can use the Peak replacement parts at a much more reasonable price.
If you want to spend about $175.00, which should include shipping, then definitely go for the Harder & Steenbeck Evolution. You get two needles and two color cups. It is a very, very nice airbrush and is my favorite. Do not have any reservations about dealing with Obeeliks which is overseas. Fantastic and fast service.