Re: Seymour d. SFX-01 PUP Booster.
IMHO, and we can certainly agree to disagree, Clapton's use of the active system marked the end of his good tone and the beginning of his awful tone. I've said it before...compare his lead tone on "It's In The Way That You Use It" from August (passive) to "Old Love" (the studio version from Journeyman) (active)...night and day. And "Old Love" has Robert Cray playing a solo on a traditional passive pickup Strat...and his tone just kills EC's...sweeter, more expressive, etc. As Jeremy said, the Duncan boost is just a clean boost, without the tone alteration, unless you plug your guitar directly into it and use the resonance switch, which is actually kind of cool. Bottom line, in my opinion, the SFX-01 is the much better way to go.
As always...friends don't let friends put batteries in their guitar.