A buddy of mine had half a dozen or so 1911s done by Gouse. I have a Walther PPK in his hands for engraving right now.

VERY good work for the money. His prices are reasonable and so is his turnaround times.

There are many 100s of high quality engravers out there. Folks like John Pease and Wayne D'Angelo are masters and command master pricing.

A great source for quality firearms engravers is FEGA. Firearms Engravers Guild of America. I was at their annual awards banquet this year and the folks that were honored did some outstanding work.