Ok... please keep in mind I am not familiar with the EG's or EF's at all. However, I do like body kits (some) and my personal opinion is as follows....
If you are going to get a body-kit get the whole kit. If you just add the front bumer or rear bumper or both the car will not look right. What I mean is, the goal, in my opinion, is to have the car look smooth as a whole. Nothing should stick out or look out of place. If you just add the bumpers then the car will not flow if you look at it from the side. The front and rear will appear wider or lower to the ground. This concept can be carried over to many other applications. For example, rims. If you put rims on a car you don't want people to only focus on them. You want the overall appearance of the car to improve, not have people look at the car and be like "DAMN those are some big-ass rims." The same goes for those hideous gargantuan spoilers. That's stupid. Also, if you put a body-kit on, for the love of god!!, don't drive around with it unpainted any longer than you have too, if at all.
Well, hopefully I have helped influence you a little bit. Hope your car turns out just how you want it.