Your best bet, if you can find a nice one, would be a Dan Wesson pistol pack with all the barrels.
You'll want/need the longest for hunting but the shorter two for competition to aid in speed of draw from the holster for the important first shot.
Frankly I'd suggest that a better option would be a long barrel .44Mag gun for hunting and a 3 to 4 inch barrel for competition. A Ruger Super Redhawk or Super Blackhawk that accepts a pistol scope would be ideal so you have options depending on your area. And the shorter 3 to 4 inch barrel gun would be great for IPSC or IDPA revolver classes. The 3 giving really good holster draw speeds but the 4 inch being a tad better at the whole sight baseline length issue. Frankly I'd opt for a 4 inch barrel.
As for which brand that's a toughy. From what I've read S&W makes the better "out of the box" trigger but with a bit of tuning and spring kitting out you can get the triggers of either Ruger or S&W down to the minimum needed by the rules. So by all means pick the guns based on what you like the feel of.
And if you have not shot a single action gun, such as the Blackhawk or Super Blackhawk, they really are much different from the DA grip shape of the Ruger or S&W guns. I'm finding that it takes a bit of a mental shift to jump back and forth and still shoot well to POA.