It all depends on what your doing with the car when you get off you P's.
Im not really sure what im doing with mine after i get off my p's or if im just going to sell it and buy a turbo.
New wheels (hard with 4 stud so best looking for multi), Sound system, tint and lower on coilovers are all pretty good things to do.
I personally didnt like the look of the grey interior so i bought some leatherette retrims for the seats, door trims, console lid etc in black and blue with the nissan logo.
Another great mod is the white guage faces and led's in the dash but be careful not to screw your cluster.
I liked the look of led's in the footwell aswell as led undercars, but its all personal preference.
Im thinking of going a gtr bonnet/grill for mine too sometime in the future.
What colour is it and is it a coupe or 4 door ??
cheers