I switched from Badger and Paasche to Iwata about 5 years ago and I've never gone back. I first got their HP-BCS, which is about the same as the Badger 150, but I noticed immediately that the control was better, there were no splatters or spiders, and the flow seemed better.
I liked it so much that I when I had an opportunity to pick up an HP- BH, which has a smaller nozzle. This brush has the built in paint cup and is gravity fed, unlike the BCS which is bottom feed with a cup (like the Badger). I finally decided to take the leap and went out and bought a Micron CM-B, which is at the high end of their line.
Some might say I'm crazy, but my models have gotten considerably better since I switched. Since I'm stubborn and set in my ways, I haven't done anything revolutionary in my building techniques in the last few years, aside from using Future as my clearcoat.
That's my two pence.
Jeff