For a hemi I used Modern Cylinder Head (they cnc'd mine). FHO does really good work too. Barton does good work, but I'm not sure if they CNC them or not.

My Indy wedge heads I sent to Dwayne Porter. He does them by hand and does great work.

I know Modern also CNC's pretty much any wedge head too and I've always heard good things about the results.

Still don't understand why some people just have to have their heads done on a CNC machine. A GOOD head porter that does them by hand is just as good. The CNC program used is no better than the hand ported head that was digitized to make it anyway.