theres not too much excitment as far as turbo cars go if your on your P's. (in melb)
VIC ROADS, VIC COPS and Insurance can be a bit troublesome, especially if you go the GTR option. not wise
if i were in your shoes. wait until your off P's then suddenly pandora's box will open. JDM s15, 34GTT, Supra TT, GTR 32 and 33 ect.. ect.. all will fit in your price range.
buy something that will keep you moderatly happy, stick with it for a year, save a little more, sell car and then when your off P's get something you will love.
thats my opinion.