If you haven't bought it yet...I'd opine that a shorter barrel is better for nearly any purpose, short of "haul it out at the range" use. I'd even suggest 4-5/8" is better than either of the longer ones, and noticeably easier to pack in a waist belt holster.
I think you'll find that the shortest barrel offered by Ruger, is as accurate in actual, off-hand use (but maybe not off a set of sandbags) as either of the longer tubes.
But it also gets down to balance in your hand and I'd say that if the longer tubes balance better for you, you'll probably shoot them better.
In deciding all of this, try the gun as you plan to use it...borrow a holster of the type you intend to use and see if you can sit in any type of seated conveyance without it poking up into your ribs...too, shoot it while standing on your hind legs...as you would if you and your buds were betting on beer...
I think you'll like the 4-5/8" model for these real world uses..(try carrying it a bit in your rear jeans hip pocket...it's a favorite of mine for informal carry here on our farm...it's very comfortable there, and that short barrel keeps it from fallin' out!
Good luck with your purchase and report back on accuracy, fit and finish etc...I for one will be interested to hear about it. Best Regards, Rod