My biggest mistake was selling my 609 Black. The silvers, while I thought they were cool at first, are grainy and bright. I've come to learn, mainly from a day with M Wagener and getting my hands on some ribbon mics, that brighter is NOT better. The smoother rounder mics like the 609 black or 906, or even 409 (awesome) sound so much better and sit better than a 57 or 609 silver, etc. Right now I'm putting a SHinybox ribbon on guitars and needing NOTHING but a little Eq-ing at the amp. Nothing after the fact. Round, thick, still plenty of top, but fuller than I could ever get with anything else.
During our mic shootout in Nahsville on dirty guitar, the 609 Silvers of mine finished in the last 3 of about 15 mics. I sold them the following week. I'm currently in the market for a 906 though.