Well Steve as people have named me here is some guidance. Paul Rebuffat CFS2 Spits, available at
http://myzone59.ath.cx/accueil.php3 (telecharger is French for download).
Aeroplane Heaven has some divine Seafires built just for FS9. You have to join to download (its free), and they are gorgeous.
Over at Avsim.net you'll find the YAS Spitfires (CFS2 models), you'll have to join to download (its free), but they work nicely in FS9 as well.
There are also a couple of Paul Rebuffats Spitfires reworked for FS9 over at flightsim.com

And of course right here at SimV we have Spits available on pages
http://www.simviation.com/fs2004vintage4.htm and
http://www.simviation.com/fs2004vintage3.htmHope that keeps you busy

Ozzy