Your list is looking good. I don't know all your mods now. I know oyu have a kit, so the spoiler would be good.
- New seats (this is what I would get)
- Maybe more suspnesion than just coilovers
- definitely wheels
- If you get Hood
spoilers definitely get a raised scoop
- Sound system, go for it
- Clutch and flywheel (this is what I would get)
- Maybe some window tint
- Maye some bigger injectors
- Short shifter
- Neons (this is what I would get)
Don't do a color scheme on the exterior. Your car will look really clean if you leave it all the same.