depends what u want man. 33gtst will not have the guts or handling of a 32gtr, but it's still not a slow car, and will be newer therefor easier to maintain and probably attract less negative attention (ie, little pricks keying the car!), also more comfy inside.
on the other hand a 32gtr is an iconic piece of motoring history, specially here in oz and is just an all out great car. personally haven't had to fork out for any repairs yet, but its sure to happen. just bear in mind that that's a likely factor when buying one.
but yeah, i made my choice, and 32gtr was the go and i do not regret it at all.