I fancy this spoiler myself...



http://www.evo-r.net/product/Blitzz/index.htm

 

Depends on your tastes.Conservative/non-conservative.
I have an OEM on my Z.Looks just about right..maybe,a bit too small.
I'd rather be smaller than larger and out of proportion to the car.
If I changed,I'd go with a Blitz type spoiler.EVO-R has several variations of these.
One is a combo C fiber.The design really flows into the rear deck of the Z.
Check it out.

 

I added the oem spoiler to my car, but I have no plans to do any aero besides possibly a front lip and a rear bumper tuck. You need to ask yourself what you want to do with the rest of the body in the long run. Might as well only change it once and do it right the first time. I'm happy with my oem though!

 

aftermarket spoiler

 

This.

 

I'm also pondering a spoiler


I'm thinking OEM, but I'm kind of partial to the Invasion. Though the $300 pricetag WITHOUT paint is a little much atm.

 

Oem spoiler, or any variation of trunk lid spoiler vertex, blitz, etc... looks nice imo. No spoiler makes the rear to round and fat looking.