Funny you should ask. I just put a down payment on my motor at JGY Customs (
http://www.jgycustoms.com) in VA. Jason and Shaun are really cool there. Do a search on this board and you'll see a post started by me that might give you some more information. Shaun has an SR, so he has plenty of experience with them.
When you email them Jason will tell you to talk to Shaun, he's the rear wheel guy. When you email Shaun make sure you ask him about the hot pink powder coat he puts on his engines...inside joke that should break the ice.
With all that said, I have not received my engine so I can not attest to the quality. However they seem to have a good rep so I'm not worried. I'll let you know when I get mine. Good luck!