Add another Ruger New Vaquero with a matching 5.5" and you are fully equipped. I'd also suggest swapping out the stock lever spring in your Stoeger for a lighter one. Will make opening and closing the action much easier. Also, since the Stoeger stock firing pins have a tendency to dub over and stick with heavy use.... common in CAS....causing misfires....replace the stock firing pins with stainless steel ones. Replacement lever springs and firing pins are available through the Longhunter site. Later on, as you become more proficient and wish to move up in the competitive ranks, you may also wish to replace the stock springs and hammers in your Vaqueros with lighter ones, too. These modifications will allow you to run your revolvers considerably faster than in stock configuration. Wolff springs are excellent. Plus available in a variety of weights. For hammer replacement, a pair of Ruger, New Model Super Blackhawk hammers will lower the hammer profiles considerably over the stock Vaquero ones, and allow for much quicker and easier cocking of the revolvers. These can be hard to come by in Canada. But, Numrich Gun Parts in the US, is a good source. The Miroku-made '92's are of excellent quality and run smoothly, right out of the box. Down the road, you may wish to acquire a second backup rifle. Also a second shotgun, and possibly a third revolver. Firearms , like any other mechanical object, can fail.....usually right in the middle of a match. So it is a good idea to have a spare on hand. As you gain more experience, you will see the need for spares.
If you haven't already done so, attend a couple of cowboy action matches. See what the other competitors are using. Talk to lots of people and ask lots of questions. Cowboys and cowgirls are the friendliest, most helpful folks you will find. Hope this is helpful.