I bought a 22-4 in .45 acp its the Thunder ranch model for Lew Horton, 4" tappered barrel fixed sights. No logo and a 5th screw. It has a fabulous blued finish which is as good as the finish on my 1967 27-2. Very accurate very nice trigger. If you do a search you can read my review.
I also own a model of 1989 5" 625.
I really like Smiths.
If you want a k frame sized .45 that holds 5 shots, I can recommend the Taurus 455 in the 4" barrel. but they are no longer being made, davidsons may still have some though.