I looked at the Sorby for a while, and seriously considered it. In the end, after seeing what they could do, I bought a pair of CBN wheels for my low speed grinder, and have never looked back. There is no comparison between aluminum oxide and CBN...the latter is VASTLY superior. I could never get my tools sharp with Al2O3 as its just not up to the task. Not, at least, like CBN.
I currently use a 350 grit CBN for most of my sharpening, although I have a 180 grit if I need to re-shape. I am considering getting a 600 grit, though, and using both the 350 and 600 to get ultra sharp edges. The 350 does a good job, and my tools are very sharp, and it takes just a matter of seconds to get them sharp (with the wolverine jig...I have tried my hand at freehand sharpening, but I don't get the same kind of edge as if I use the jig)...I'd say I spend no more than 30 seconds sharpening any tool. That said, I can still see a bit of a jagged edge (not so much a curled over "burr" like you want, just a jagged edge, which leaves marks in my wood, fine as they may be)...hence the desire to get a 600 grit. I think I'll spend most of the time with the 350, then a couple quick passes with the 600, and back to the wood.
Since moving from Al2O3 to CBN, my tools have gone from me having to work hard, and really push them into the wood...to the tools just gliding through the wood, requiring very little effort, cutting it like butter. I never understood the term "Let the wood come to the tool" before, but since moving to CBN it makes total sense! The wood, once you get the cut started, just pulls the tool through it. All you have to do is maintain the proper angle to get the shape in the wood that you want.