Basically, many S&W fans avoid anything made after 2000. That was the date of the infamous anti-gun agreement. And while the newest owners of S&W have recanted that agreement, they haven't removed the infernal, internal locks. The jury is still out on MIM. S&W isn't the only manufacturer to use that methodology.
There are many very well made 70's, 80's and 90's revolvers out there. I saw an early 4 inch Model 66 "listed" at a gun show for $575 on Saturday. This was one of S&Ws first all stainless revolvers and I do mean all stainless including the sights. Had a pinned barrel, a trigger stop and recessed cylinder (all standard features in the early 70's). It is K frame so it's a good balance between weight and firepower.
The only "current" model I would consider buying is the 460, only because they didn't make one prior to 2000.
There are still good bargains out there, though some insanity exists. A 625 in 45LC just closed on GunBroker for >$1,500.