Honda Head Work

I was wondering if anyone has heard of DH-Racing. Are they a good company. I'm looking to get my head ported and polished and would like to know what place in SoCal does good work. I have already been recomanded to Port Flow, but I like to have options.

ive heard of a couple people having bad experiences with dhr.

you could also check out www.alaniztechnologies.com

theres rs machining which is what exospeed uses i believe