i actually voted black,
the red does look good and goes very well, but my thoughts were, go black and then use the lettering to pick out the colour.
i've been having the same thoughts about my own brakes, and have decided to go black (currnetly gun metal) but use gold to pick out the lettering on them. (to match the gold wheels)
the reason i say this, is that you have alot more options in colour when it comes to vinyl so getting the right shade of what you wnat is alot easier. you'd be peeved if you had 2 tones of blue down there. if they are being painted do you know what they're painting them with? if its not specific caliper paint any kind of brake fluid on them can strip the paint off. Caliper paint has a specific polymer base to it to make it resiliant to brake fluid and dust etc.