I've never owned a revolver that didn't benefit—or at least, couldn't have benefitted—from an action job.
All I did to my pre-agreement Smith & Wesson model 60 was replace the trigger rebound and main springs, polish the rebound slide, and clean everything within a sixteenth of an inch of its life. Some revolvers require major surgery, sometimes including stoning the hammer-sear connection, sometimes including replacing worn parts, sometimes costing hundreds of dollars.
I believe it all depends on what you start with and what you want to end up with. My 1951 K-22, for example, already had a wonderful single action trigger, so all I had to do was replace the rebound spring and polish the rebound slide. It doesn't have a truly excellent double action pull, but there's not much chance I'll ever shoot it that way, so I gave it a bare bones job. I have a Python that needed the works, and since I don't still work on Colt revolvers, the job was expensive and time-consuming, and included the extra cost of shipping it across the country and back.
If your J frame were mine, I'd start with stripping it down to the frame, cleaning it thoroughly, lubricating it well, and taking it to the range. If that didn't take it the whole distance, I'd contact the good folks at
http://www.gunsprings.com about replacement springs, and I'd polish the rebound slide, too: ten minutes' worth of polishing can make a measurable difference. Replacing springs in a carry gun
necessitates putting a fair amount of ammunition through the gun to make sure it's 100% reliable. Not all springs work right in all guns. If that still didn't give me the trigger I wanted, I'd either turn it over to a professional gunsmith or work on the sear and hammer myself—but I wouldn't even consider doing the latter without Kuhnhausen's book nearby.
As far as I'm concerned,
every gun ought to have a good trigger. For myself, that means a very light, crisp single action and smooth double action. There are people who hate light triggers and don't mind uneven double action pulls. Only you can decide.