I think you'll be happy with the Choate, if you wind up being OK with the change in balance to the gun. They've been a good deal (quality vs. price) for quite a while now IMHO.
A loaded steel extension isn't really that heavy, relatively speaking, but it puts a few ounces out in front of the support hand. That makes the weight feel heavier than it really is. It may make a difference to you, or it might not bother you enough to worry about. The only way to know is to try it and see.
But if you do put a 2-round or larger extension on the gun, be sure and use a barrel clamp with it. Otherwise any lateral stress applied to the magazine extension could damage the threads on the magazine tube itself.
Mindset - Skillset - Toolset. In that order!
Attitude and skill will get you through times of no gear, better than gear will get you through times of no attitude and no skill.