Good for you. Let us know how it shoots. Other than the comments about the bore interiors on a few guns, I have heard nothing but good stories about how the new 29s are shooting. Hope yours works out well for you. 

Well, I went and did it. I JUST bought a beautiful model 29-10, 4 inch, blue model. The polished blue finish, including fit and finish are outstanding. The craftsmanship is top notch. There was a 6 1/2 inch model at the dealer as well, but I thought the 4 inch looked better. It has a very highly polished finish.
I have both lock and pre-lock guns. I don't collect them, I just shoot them. I rarely sell anything. Nothing wrong with MIM and locks. Just not enough of a proplem too worry about. S&W is still the best revolver on the market. Jim
I own two of the newer model S&W revolvers, and also a few of the older models.
My 625-8 45ACP is well finished, the action is smooth, and is really accurate with just about any ammo I have used in it. I did install a C&S long firing pin, and lighten the action. I am well satisfied with it, having owned it for at least three years now.
I also have a 629-6 44 mag classic that I bought used, made the same modifications as the 625, and it is also very accurate and performs well. Sometimes I think it is a little muzzle heavy, with it's 6 1/2" full lug barrel, but it does help with recoil.
Both guns still have the lock system intact, and I have had no problems with it so far, but I also do not use the lock.
In a lot of ways, with the use of the modern CNC machines, and the MIM parts, the new revolvers are smoother and more tightly fitted than the old guns. I know this will cause a lot of heartburn for the guys who love the old guns, but I have owned a vary of S&W revolvers over the last 35 years, and that is my view on the guns.