Well I guess it mostly depends on if you want more exterior or interior. But here are a few suggestions:
- Carbon Fiber Hood
- Smoked Fuel door
- Reverse Indigo Gauges
- Console Paint/Carbon Fiber Kit/Aluminum Kit
- New Seats
- Neons under dash
Those are just a few different things you could do. Now if I personally had that cash I would do a mix of the above and change the stock audio system.
Personally I'd get a kit and some springs to drop it, eibach or TRD
depending on what kind of kit you get. I'd paint the console, trim on the door, vents etc. I'd match the paint to go along with your choice of new seats so it matches nicely. Finally I'd throw in some new reverse indigo gauges.
As for the audio I'd go with either a 10 or 12 inch JL sub and JL amp. I'd throw in an alpine head unit. Lastly if I could I'd try and upgrade the door speakers preferably with some JL XR's but thats all personal choice on what sound quality.
Everything of course all comes down to personal opinion so what you want may be different fro mwhat I like.