If you want fast, friendly service and a great rifle to shoot, go with Troy at InRange C2. He built a 5.45 for me on an OOW receiver and I've been very pleased.
If, however, you are looking for something that more closely approaches a thing of art, I have to give my vote to Ted Marshall in Arizona. He resurrected my DGS hatchet job for me and now it looks for all intents and purposes to be an '89 Tula. Starting with a Hungarian receiver, he cleaned all markings, relocated them to the bottom, added the trigger "hump", corrected more problems than I care to list, and then returned the whole thing to me. It wasn't cheap, and it took forever and a day, but it was worth it in the end.
Saleen