Go to an event and see what the folks are using. Good chance most will let you handle them and be happy to answer questions. Going with the most common isn't a must anyways. I have a set of .32 H&R mag Single Sixes and a 1894 Marlin in the same chambering.
The events I've attended, Ruger was by far the prdominant brand. Again, all depends on what you want. What class you'd shoot in, etc...