I personally think clear sidemarkers with the chrome amber bulbs would be what I'd choose. To me, there's no point in drilling holes into your fenders if the part you are putting in is too subtle. The sidemarkers are usually put in so that they are noticeble and useable.
Also a lot of Euro cars run clear sidemarkers, so it would give it that look if you run clear sidemarker IMO and would be different on an RSX for sure.