A while back I picked up a 645 in very nice shape.
I had intended on using it for trade bait, but after shooting it just once I was hooked.
Normally I am not a bi fan of traditional DA/SA guns (aside from CZ 75s), but this big Smith really grew on me.
It is accurate and pretty easy to shoot well.
Now I have been jonesing for a 4506. Actually the 4506-1, with the straight backstrap is the one that I really want. Back in the 90s, I recall a buddy had one, and while I thought it was a handsome looking gun, I discounted it, due to the fact that I was carrying a G21, that was lighter, held more ammo, and was very accurate.
For a while I was issued a 4586 DAO, and absolutely HATED that gun. The DAO trigger was a massive hinderance to fast and precise shooting and really soured me on 3rd gen guns in general.
Due to the fact that we have some rather "seasoned" coppers here, I figured a few guys probably have some history with 4506s.