I just sent mine out to http://www.norcalmods.com/ I read from a few people that went through them. I emailed them and they are good a responding with emails. So far seems ok to me. Ill let you know how it goes from here.
PS i'm having a Matrix Infinity chip installed. They don't carry DMS3 but I was interested in that chip as well. But from what I've read the Infinity and DMS3 are dead even.