did you get the cloth seats? if so then if the sprinkles are red then red if the sprinkles are blue then blue....just a thought. just don't go too extreme. I did red on mine and it came out realy well...people wanted to know how much my brembo brake kit was...lol get a foam brush and spray the caliper paint onto it.....sand down the calipers lightly since it's fairly new.
Looks pretty sweet to me. I like the wheels and rear spoiler too! I wasn't sure how the spoiler would look so I've been avoiding that choice so far, but I like it on your 3. You should definitely consider painting the door handles to match the body, or maybe with the chrome covers.
I've got a US 3i with the beige interior. I really don't like the oem beige cloth. I'm probably going to go with leather and keep the OEM alloys.