I have a Taurus 66 3" that I like a lot. It's a tad heavier than my SP101 was, though, and a square butt. The SP101 was easy to carry. The Taurus ain't hard, just a little more lump twixed the belt and skin due to a 6 round K frame sized cylinder. To me, the SP101 is the best carry revolver in .357 for use with full power 357s extant, but that Taurus is a dandy. It's a little easier to shoot, both having Hogues, and it's a little more accurate than the Ruger was. If I didn't have the Taurus, I would be looking to get a 3" SP101. I will not buy a new Smith and Wesson, lock or no. The Ruger is a much better gun for the money than a new Smith IMO. Used ones, if you can find a deal and lockless, I would consider for sure. Nothing wrong with a 2.5" Smith M66 in the IWB role, either, far better IMHO than a J frame, especially a new one and if you can get a round butt on that 66, it's near as concealable and a round more capacity.
Lots of choices, but I really do like the SP101s.