748 only really produces the same sort of power as the Jap 600's, looks awsome and sounds awsome.
996 / 998 is probably a better choice after an R1, was looking at a 998 Matrix edition myself but they are quite old in the technology now and i fancy the more modern bikes with the digi dash's and decent switches etc, not to mention the Dukes rep for being on the back of a brakedown wagon