As far as I'm aware the 8v hubs won't take the 256mm calipers, I think the old driver hubs ect (and obviously 16v hubs) can take them, but not the 8v. BUT, the 8v hubs can take the 280mm g60 setup.
I'd say your about right with that list, although you could get some new hoses while your at it, and some new fluid.
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