Had a little mishap with my Woodcraft 8" slow-speed grinder last night, sharpening with the Wolverine and Vari-Grind attachment and lost control of the tool. Gouge (my nearly-new Thompson 5/8" V, dang it) and vari-grind slammed into the wheel and broke a big chunk out of it. Now the wheel is horribly out of balance and basically unusable. Oops.

So now I need to get a new wheel and am looking for recommendations. Do I drop the big bucks and get one of the new CBN wheels or do I just get another aluminum oxide wheel? What's a good source for a quality aluminum oxide wheel?