There's nothing at all wrong with the new 29's as a whole. Sure, you can get a lemon, but believe it or not, Smith and Wesson, (and everyone else) turned out lemons back in the day. The difference is they've gotten fixed by now.
In another thread, I mentioned that I recently passed on a Model 29-2 for a 29-10 for a few hundred dollars difference in the price. While I don't like the lock, it doesn't bother me. I don't even think it's all that bad looking. It's just another pin or screw in the side of the gun. Now, if someone doesn't like the lock for whatever reason I'm not going to try to change your mind, but the guns themselves are OK. IMHO of course.
Here's the side with the lock. Frankly I have to look to see it. It is more noticeable on a SS gun I think. I have swapped out the stocks. The Altamont's are thinner than I like, so I just put a set of Hogue's on it for shooting. I also admit that I don't shoot a lot of magnum ammo in it, but the only thing I shoot at is a paper target, and they don't take a lot of killing. It's just a big gun that makes a big hole in the paper. I need to take it to the range this weekend now that I think of it.
It looks better now after a few coats of Ren Wax by the way.
That's the key. I almost always buy used, and mostly from the same big local dealer who has a reputation for not selling "junk". I still inspect every gun I buy. Keeps them on their toes, and I get to educate the young whippersnappers behind the counter.