Half of the people here saying to keep the old stuff have LED lights and all of every other mod you can think of. So do what you want for you, and be happy!
That's kind of an apples to oranges comparison. LED's, EFI and things like that are new designs and frankly aren't always an improvement.
Saying the stock suspension design vs. a COC is like LED's vs. incandescent lights is implying the "old" stuff is an inferior design and I haven't seen enough improvement with a COC to warrant a fairly large investment of cash all at once. Certainly a COC is all new parts and has benefits like header clearance, but geometry wise it isn't necessarily a step up. I know people have felt a difference, but only one that I know of has done more of a back to back test and even he had to do upgrades to get to a point where he felt like it was better. There is a know thread about it if you want some (un)easy reading.
Be careful not to fall into chronological snobbery.