I think it's a really personal thing.
If it were my SQ5/Q5 and I had Black on Black I would happily take it as it gives it a more 'masculine' or 'drug dealer' look (IN MY OPINION
), however if a family car and you want something with a little more elegant then Chrome. For the Grey I have chosen I stuck with chrome due to the fact that it's 1. a family car and 2. Looks better on a Lava grey colour with chrome.
But good luck on your decision, either way it will look good with your spec, just depends what type of 'look' you're going for!