exactly what he said dude...
The Invader 6 body kit is another form of the veilside...particularly an early version. Street Prototype on this board has the veilside rear bumper and side skirts with the invader front. As you can see with my sig...I have the veilside side skirts and rear bumper along with a blitz front bumper. Loved the two...had to put them together.
i am only lowering mine about an inch due to crappy roads and such here after I get my wheels. TRD
Getting rims and lowering the car just makes the body kit flow better with the car...there isn't that gap you have from stock. Once again...I haven't done that yet and I think it looks fine...just not perfect yet.
You would need an air suspension in order to do that raise/lower stuff. You are better off not paying so much for that and just get a good size drop.
Some people have dyed the interior's dashboard and some have painted them. That to me is too much work and you don't need to. Just paint or get a dash kit for the center console parts and such pieces.
I don't know what you mean about the leather texture...I think it is due to the dye that it expresses the formation of everything better. Hope this helps...the other dude answered most of it...just do some searches and you are bound to find everything you need such as what the best exhaust is and such. I have the Tanabe Super Racing Medallion exhaust on my GTS. TRD
is great also.