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I admit that I'm generally biased towards silver finishing kit since I have it on all of my bikes but I don't mind black finishing kits either, depending on the bike. As for your frame, I think that silver finishing kit would tie in very well with the chromed forks and rear triangle. Imho, on a classic frame it's usually best not to murder it out with all black parts but to keep a few silver parts :)
You don't like black finish, @Sig_Arlecchino ?