you better off buying a r33 GTS25, insurance for it will be around 1500 full comprehensive as long as you've had no fines/accidents etc through justcarinsurance - well it was for me when iw as 18.
A R34, due to the price, and newer car etc etc would be just as expensive as a turbo version
Things to note:
r34 and r33 N/A's are not 'that' much different power wise
r33 will be cheaper to buy, and cheaper to insure
/plug for himself
i might be selling mine: http://www.gatty.net/car/