If you are looking at exterior styling, how about colour co-ordinating the side (bump) strips and wing mirrors (Red)? Subtle, but effective.
Some people think the standard plastic colour/black actually makes a nice contrast against the body, but looks sleek painted, something that I'm considering soon (and shouldnt break the bank).
EDIT: See that you have lowered your car already. Springs or Coilovers?
If just Springs, with the budget you mention, might even like to consider getting the car slammed properly, on a nice set of Coilovers.
Mine is currently lowered on Eibach springs, but the rear still sits higher than at the front. With adjustable coilovers will be able to drop the car nice and low over both wheels evenly
