i think the capita is too stiff, same with the darkstar. I'm not sure about the cheaptrick.
Its hard trying to find a board that does 'all of the above'. Buttering is great with a board designed for it, same goes with hitting booters and pow where you need a stiffer board. If you want to learn butters I recommend getting a jib board, they make it effortless and MUCH more enjoyable. You may not want to hit the 60 footer, but your day will be for jibbing around having fun, and it will open up another side to snowboarding that you haven't seen before. Soft board are everywhere now, k2 Weapon, one of those Nitro kooley sub-zeros or a Rome Artifact.
So I say, ride to the conditions, or who you're riding with. If the snow dumps down, you want airtime or your mates want to head BC, ride your custom. If its spring time sunshine slushies and buttering with your crew, get out your jib stick.
Also, it really depends on your weight, if we're talking about flexibility.