It will look awesome.
Yes, after seeing the pictures of your white realforce with the blue keys, I had to have one. I plan to put yellow keys on my black 87U and then the white ones that I removed from the white 87U onto my older 86UB (at least the keys that will match).
Too bad that Topre does not sell a similiar set to their 10th anniversary one. I really like that darker gray.
Is there a market for the black Topre keycaps that I remove from an 86UB and 87U?