why is it not you?
a 33 gtst is an amazing car to drive, that being said i havnt driven a rexie and i do love the burble of the boxer.
the pro's and cons cancel each other out most of the time, do a search for one of the many gtst v wrx threads and there should be plenty of info for ya.
also a search for problems to look for with a 2nd hand 33 will be a wealth of information, there was a article in HPI a couple of issues back too
happy decision making