both are nice car, but which one u want?
try both first, 300zx more touqre, more powerful and handle like drive a go-kart on the road and....... 2people only.......
skyline R33, more comfort, a bit easily to drive and easily to mod. and it can be good for 4 people .
of cos, for my opinion, i will go for Zed bcos Zed have a nice lookin, good handle.......