I've been collecting serial number and configuration info on #5s for about a year now and have, off the top of my head, only 12-15 guns in my database with another few I wasn't able to get info on. I own K11 in .44 mag. Bill Grover definitely appears to have made some configuration changes early on in #5 production, standardizing the configuration, whereas the early guns appear to have been basically handmade with resultant minor differences.
I really like my #5, but I must warn you that TLA guns are not the be-all, end-all that some people say they are. For the money, buying a Freedom Arms revolver will get you a better gun. A common problem among TLA guns is lockwork that is not heat treated, thus with use, the parts get deformed and stop working correctly. I've encountered this problem with about 1/3 of the TLA owners I've been able to interview. However, many of the owners never shot their gun or shoot it only sparingly, so the problem may not have shown up yet. For me, I automatically add $300 in my head to the purchase price of a TLA so that it can be sent off and the lockwork heat treated if necessary. Dave Clements did mine, but any of the good revolver smiths can take are of it.
Also, Grover used soft solder for my front sight and ejector rod housing stud, so at the first shot, the ERH stud flew off the gun (with the ejector rod) and the front sight was well on its way to coming off. Clements fixed this for me, too, so my gun isn't 100% original, but it works and works well.
Finally, the NRA, I think, was spot on with its mild criticism of the accuracy of Grover's guns. Mine is an accurate and consistent gun, but I could have gotten a more accurate gun by buying a Freedom Arms for the same money. TLA guns ARE prettier than FA guns, though.
If you want a TLA, by all means shake the bushes and get one. However, please do it with your eyes open. I was bitterly disappointed in mine at first, but I'm glad to have it now. It is my main hunting gun and goes with me in the woods often. If I ever get another, it will be the same way. I refuse to own safe queens.
