I'd wait a while before you sell off your m43 gear Luke. I've thought about doing that a few times, making a wholesale switch, but I've never done it and I'm really glad I haven't. The Fuji is an awesome camera but its a long way from being an awesome system. And even to the extent it may be, its a very limited system. I LOVE the Fuji gear and hope they continue to grow it, but m43 is just so damn useful for so many different types of shooting that I'd be lost without it. Its my DSLR system in a sense, since I never had a DSLR. But its the one that'll do anything pretty well with about a zillion lenses to choose from to match the right gear to the task at hand. I can go weeks without shooting anything other than the Fuji, but then when I need it, I'm incredibly glad to have the OMD there too. In the end, I probably use the OMD more because I'm usually more of a task oriented shooter ("I'm gonna go shoot THIS today") and the OMD is just the right tool for a lot of those things. And when I just want to go for a photo walk with no particular goals or intent, I take the X-Pro and love it, but I suspect I'd feel differently if it was my only option.
Everyone's different and you may ultimately only use the Fuji gear. But right now it has that new camera smell and its seems right for everything. M43 will never have the romance of the Fuji, but its a damn practical and useful setup. I'd at least give it a good long think before you get rid of it. Unless you have some sort of DSLR system to do the same job...
-Ray