Looks great.
Just make the text stand out more and change it. I would prefer that small block letter text (Visitors font or whatever it's called) and the sig'll be awesome.
I give it an 8/10. And yeah, Black Hawk Jedi said about the main car render needs to be blended in better.
So if you done the text better and did the car I would give it a 9/10. I rarely give things a 10/10 as I'm not sure what actually makes a 10/10. (I think Lost though is the program I've only rated 10/10 lol.)
Chris