It's all totally subjective and ultimately, it's your ride, your cash, so your call but since you asked....
The I agree with Bulk that you should stay classy. (Credit: Ron Burgandy) The stripes are more Mini Cooper. They look great on a Mini but not an X5. I saw your post about the LED tail lights and your concern about matching. I would not go with the all smoked as I don't care for that look. I think it would clash with your Imola. The regular smoked/clear combo is very nice. That's what I have and I know you saw the pics. If you want a closer match to the Imola paint, get the red/clear. They are slightly different red but not so much that it will stand out. You will get the cooler looking rack of 18 LED bulbs lighting up rather than the one bulb. Get some LED license plate bulbs too. They're only about $13 a pair on eBay. Maybe also some HID fog lights. I did mine and it was worth the $85-$100. Finally, another suggestion would be to swap or mod your headlights with angel eyes and clear corners.
One little mod that I haven't seen anyone else do is to color match your kidney grilles. Mine are all Steel Gray. Many guys have put on the matte black grilles but I think all Imola would look nice. You can buy a second set of grilles to have it done so you can switch back if you don't like it. I think the color matched grilles give the E53 a more aggressive appearance from the front. It is also fairly subtle.
It's fun spending other peoples' money.