I like this idea, I've become a bit attached to the Haro as I've been having a lot of fun riding it. Cheers mate.I have built wheels and a year or so ago had a new hub put in the Muru front wheel when I had to change forks. Doable but not the most cost effective option when you factor hubs, spokes and labour.
I would grab new wheels and anything that is specific to the new frame like cranks etc to maintain chainline. Keep all the old parts and pick up a cheap donor and rebuild the first bike for a commuter etc when you dont need the new beastie. N + 1!