Now this is downright fascinating.
I had no idea that there was such a dearth of revolvers out there that didn't have adjustable sights-- at least compared to 357 Mag. Ya all have educated me.
A quick perusal of Gunbroker proved it-- GOBS of 357 Mag revolvers, new and used, with all sorts of configurations. 38 Spl? Very few models without fixed sights and moderate to long barrels.
I'm beginning to think I might just amend my search and go with a 357 Mag pistol. It's certainly cheaper to own. Although I'll definately now keep an eye out for a suitable used S&W.
Many thanks.