Even the red endcaps on the brake cables I would change to black
them endcaps are not all red, It has one red, one blue, one green one yellow
@SalsaLover: Yes, I noticed the blue one, on the front derailleur cable but just assumed the rear derailleur cable cap was the same. The blue is ok as it complements the major blue Colnago lettering on the frame, so you were granted artistic license on that one.
But change the green one to blue also.
However, I knew there was something I forgot in my previous post... that is... it looks like you've got a Teflon sleeve over the stainless steel brake cable between the cable stops on the top tube. Get rid of it. It's ugly. Like those little rubber donuts some people put on their cables. Unless the cable is actually hitting the frame during riding and rattling, it's a useless superfluous piece of ugliness that does nothing.
As for the spacer tower... it's fine, given that you wanted the -17 degree stem look. But I'm now of the mind that I think the -17 stems really worked best (aesthetically) with the older quill stems, the kind that just flowed over the top smoothly, as opposed to the hard edges on the top of a current "A-Head" type offering. But starting out with the -17 is the way to go, because it's an easy change to go with a -6 if you decide to. Can't really go the other way around without going significantly lower which doesn't appear what you want to do.
And yeah, some tubs would do it better justice. I don't have one bike for this or that and I know, or at least think, you were saying all their different uses as sort of tongue in cheek humor. My road bikes can all be used interchangeably, as far as road conditions or weather goes, different disciplines (mtn biking for example) excepted of course. I do have different wheels/gearing however, also interchangeable.