dont match the exterior. or you will have to pay a crap load more to have the engine bay painted to match. If you have the car painted any other color than its orginal it will make the job look cheesy just because the engine bay wouldnt be the same color. Save your selve the hassel and have it repainted in its own orginial OEM color. Don't paint the door pillars or side veiw mirror jams as the rest of the car either.
Or consider selling the car for slightly less and leave the paint up to the next buyer they might have something in mind anyhow. a good paint job is going run 3-5k anyhow.