When one starts upgrading, it is tempting to go all the way. A carbon mast seems tempting, but the aluminium mast on the Taipan 5.7 is already very good (= Capricorn mast).
My recollection is that Macca's Super Taipan has added 1 m to the mast length (ca 10.5 m) and ca 0.5 m to the platform width.
Going for the complete Tornado-killer setup means mast, new sails, new beams, and new trampoline, and is too expensive for our happy amateur sailing budget.

And to be boringly realistic: The Taipan 5.7 is alrady a very fast boat, and for us there is much more to be gained from practising sailing it than rebuilding it.

Stein