Just because it's a PC, doesn't necessarily mean the quality is any better than stock. Highly suggest whichever one you pick, inspect it before buying. The competitor does have the advantage of weight adjustment and most have the more expensive rear sight. They also have the option to mount a scope/red dot if that is your desire. Given that, the front sight is what it is and for the most part non-replaceable. One of the complaints I have with my 629 PCs is not being able to replace the front sight. I have a 629 RSR 1-500, similar to what's pictured above. Quality firearm all around. Took it hunting one season and have since switched to my 5" simply for ease of carry and if it gets beat up a little, so what. The RSR gets beat up some, I care a whole lot.

If you're set on the 6.5", I'd hand pick one, throw a spring kit in it, and pick/chose whatever rear/front sight you want for it. The nice thing about a smith is it doesn't take much to smooth the action out.