Rear Spoiler and Bumper

I wanna give some changes to the rear of my car,
and the first thing I should do is to change the spoiler to a bit higher one.
My car is an P11 Primera GT, a 5 door hatchback, and there's not much space at the back to put a big spoiler I guess.
Any suggestions on what would fit and look good?
What's the spoiler that Kevin's got on his turbo primera GT?
I think it's the Subaru Imprezza's one, but I am not sure it would fit.

And, for the rear bumper, what would fit? and also look good?
I want to change them while I can.

The rear bumper and the rear spoiler.
Thanx

You can always check www.g20style.com for ideas.