I don't fancy the Fuji provided grip as it gets in the way on the bottom for battery and card. There are two that come to mind - RRS (Really Right Stuff) and a Chinese knockoff that I believe people are buying on ebay.
I have the RRS plates that compose an L-plate but only use the one that fits on the bottom so that I get the fast detach from my tripod. It is still comfortable in my hand. Are you planning to hand hold the 55-200? If so, a hand grip would be a good investment. Just realize that depending on your fingers, the release for the lens might be a tight fit slightly. The RSS solution is not cheap but I admit I refuse to get Chinese knock-offs on anything when possible even though in this case it is substantially cheaper.
You may want to consider a thumb rest/grip. Some believe those do more to keep your right hand in the correct position and avoid accidentally moving dials or pressing buttons. There are a few makers of those from cheap to somewhat expensive. My only reservation is that they mount to the flash hot shoe socket and thus no flash can be put on. There is one place where you can get a "hot" thumb grip as in still can put a flash on top. The guy who sells these uses the Canon adapter that allows for also a cable to the flash. Canon's cable appears to work for off camera flash.
Fuji's RAF/raw files are known to be problematic for Lightroom and Aperture as well as some other software. I believe Capture One provides a more meaningful solution (for now) and Lightroom 5 is catching up and Aperture is behind slightly.
Here is a link you might enjoy -
http://browse.feedreader.com/c/The_Aperture_Blog/467634420
This should get you going in Aperture nicely. The "goodness" of the Fuji sensor is also its Achilles heel when it comes to raw files. There are a couple of other software solutions that are on par with Capture One but are a bit too archaic for me.
Last - if you go to RRS site, they have other types of equipment that you may find interesting. This is a suggestion as not to buy but realize that some of the "macro" and long lens gear may give you ideas on how to bet the most solid foundation for the 55-200 zoom on a tripod.
I come from a film camera background and I admit it took me a long while to wrap my head around the digital image way of thinking. I do have a history with Photoshop and DXO software and back when Capture One used at times with a Nikon D200 NEF/raw files. I am more at home with restoration of physical images (photos, negatives and transparencies) which is what I do mostly via Photoshop.