If I had to start thinning my S&W herd, one of the last head of stock that would be culled is a 1948 vintage K-22, forerunner to the modern Models 17, 18, and 617. If I were starting over, that would be one of the, if not the only, gun I would look for. FWIW, I own a pre-War Heavy Frame Target and a bunch of H-S autos as well as a H-S revolver, but the K-22 is my fave of the bunch.
Froggie
PS The 4" would seem useful to have as one of a couple of 22 revolvers, but if I only were to buy one, I'd personally go with the 6".
PPS As I've said elsewhere, I'd want a 38/357 revolver as well... a matching K-22 and K-38 or perhaps a 6" Model 19 would be a winning pair. I have a just such a pair that dates to 1948 (K-22 & -38) thatjustseemto be "right."