Do you want semi or revo?
The III series rugers will 100% need trigger work. This is because of the magazine disconnect. It can be fixed for $8 with a MkII hammer bushing, or you can go all out like I did and go with power custom/volquartsen internals and have a darn sweet adjustable trigger.
My III 22/45 did not like bulk ammo until I put a reduced power hammer spring in it. The bulk stuff wasn't powerful enough to overcome the factory hammer spring and would leave empties in the chamber. The bolt would sometimes not move at all when fired. After replacing the spring, it has been 100%. I only clean this thing when I put new parts in it, which from now on will not happen because I've upgraded all the internals. You should seriously see what the inside looks like. I did have to pick out the extractor groove about 3 years ago after about 20,000 rounds because the groove filled up with crap and the bolt wouldn't go into battery.
The buckmarks come with an actually decent trigger. They're quite a bit more money, but if you are going to put $100 into the trigger on the ruger, may be a cost effective option. Not as much aftermarket mess to have the opportunity to blow money on.
Found my girlfriend a stainless 5" mkII 22/45 for $200 on armslist for last christmas. I will say that I prefer this grip to the mkiii 22/45 plain skinny grip.
It should be noted that a non-22/45 MkII will have the magazine release located under the bottom of the magazine, whereas the mkii 22/45 and all markIII will have a thumb button like a 1911.
I also have a H&R 929 9 shot revolver. If you go with a revolver of any brand, get a 9 or 10 shot. Think about it - 9 shots is 50%
more than a 6 shot. I cannot see paying $600+ for a sw617. I like my 929 and have 6 speedloaders for it, but I am thinking about selling it soon simply because it doesn't really offer anything over my 22/45. It is cool though and was made in the late '70s.
Ahh, found some photos:
and if you question my credibility: