I also ended up with a 17-4 I bought at the Gun Library at Cabels’s -- be surprised what they have. They both shoot better than I can.
I have an older 617 (6 shot) I like to shoot also. The trigger is a little heavier -- not as smooth as the others (time and patients, with more rounds down range).
I pickup a Model 18-3; looks just like my model 15-3 -- Very, very smooth trigger -- seems I can keep this on target a little better than the others. A bit pricey also -- very pretty handgun.
If I had to choose -- I like them all -- that why I have them.
If your ever in Broken Arrow. The Colt Diamondback -- Dan Wesson 22 and even Ruger LCRX (3 inch barrel) are excellent and fun to shoot; I have a Ruger LCR .22lr (1 7/8 inch barrel, very, very heavy trigger) that I had dialed in and; foolishly; I changed the front sight, been fighting with it ever since.