I am pretty sure that most Busse's have asymmetrical sharpening bevels, being flat on one side and convex on the other. I'm not sure about this perticular model, and I'm sure somone on the Busse forum with more knoladge than me could tell you for sure, I also recall there is alot of info about sharpening them there.
as far as sharpening tools, there are as huge of a veriaty as there are opinions on wich is better. do some research, try out a couple of reputable types and see what you like would be my suggestion. we've been discussing Arkansas stones here (also has a picture of a convex edge):
http://www.bladeforums.com/forums/showthread.php?p=4153908#post4153908
there is some info on convex sharpening here:
http://www.bladeforums.com/forums/showthread.php?p=3770814#post3770814
FYI, if it is a busse asymmetrical edge, the convex side would be difficult or impossible to sharpen on a sharpmaker, and impossible for sure on the EdgePro and lansky (although I've heard great things about the edge pro and sharpmaker) unless you wanted to change it to a flat sharpening bevel on bolth sides, also you could sharpen the flat side of the bevel with these systems. convex sharpening, as far as I'm aware, is done freehand.
heres a few types of sharpeners you might want to look into: for freehand sharpening india and Arkansas (my favorite), waterstones, ceramic wheatstones (i think spyderco makes some of the better ones) diamond, Microfinishing film (PSA or non PSA, made by 3M and others, sonetimes called scary sharpening, basically sandpaper on a flat surface) and various kinds of stropping for final finish.
If you’re looking for a sysetem, the edge pro is highly recommended by a lot of people here, and the sharpmaker is good too (I wouldent really call it a “system” its a combination of freehand sharpening with rods at a fixed angle), I wouldent go for the lansky as it changes the sharpening angle as you progress twards the point, thuss thinning out the point (wich typically you don’t want for general use) and making the part of the blade closer to the handle a more obtuse bevel by comparason (also not ideal for general use) I had one a while back and hated it, I was unable to get a decent edge at all. there are hundreds of systems and opinions of course. Hope this was helpfull