Convert my 2004 Outback H6 LLBean to an S401 wagon. 6MT, full S401 body kit all around, repaint to WRB, and BBS RE's. Only thing that I would retain would be the EZ30D, and I would modify that with a twin-scroll turbo setup and forged internals.
Would then proceed to throw on some AST 4100 coilovers (if they fit), some AP Racing brakes, some extra chassis bracing, and some 2008+ STI front seats reupholstered in tan leather to match the rest of the interior.
Would finish off with an iPad mounted in the dash, MightyCarMods style.