Well, here are my suggestions.
Don't forget the lines of the car no matter what you do. It's the lines that keep everything together, that keep it clean, that keep it looking good.
Also, pick a color theme. For those that know my car, they know that I try to keep things dark. But some people like the brighter tones, like red and yellow. Choose whatever you want. But whatever you do, don't go scattering different hues all over the car, as it will take away from the car's smoothness.
Along those same lines, I highly advise that you get rid of those tails. I have aftermarket tails myself, but I only got them because they go with the rest of my 'color scheme'. Since your car is black, the chrome just .. clashes. It would look much better with a set of dark tails (like mine) -- or there's a set of red aftermarket tails that I saw on the forums somewhere, that looked very nice.
Don't try to take on too many projects at once. I think that might be your main issue. You're trying to do EVERYTHING to the car at the same time -- body kit and suspension and interior and so on. Do one thing at a time, man. It will result in your car not being in pieces for so long, and you'll be able to concentrate more on doing a single mod RIGHT if you're not distracted with doing 30 other things. Know what I mean? Plus, doing one mod at a time allows you to see your car slowly but surely improving -- it's a good feeling.
Good luck!