33 gtst's are cheap at the moment.. you shoulkd have no problem getting one for 11. i did, and that was like 5 months ago. so as far as your 3 choices, i would go with that personally.
but someone who likes 32's over 33's will point you that way.
11g will see you out with a nice 32 with some goodies, a decent Series 1 33. and if you want a NON turbo then you would probably be able to score a Series 2 33.
it all comes down to your personal taste. just make sure you get it all tested and checked before you buy.
also keep in mind your insurance , transfer stuff and everything, cause that can be like upto 2k on top of the car once you get it (especially if your on P's)
good luck with the hunting.. be patient and make sure you settle for something your satified with.
welcome to the forums
jake