Re: Fat Cats
I don't think Floyd Roses so much kill the tone of the guitar as they do possibly kill the subconscious "vibe" of the guitar, making us percieve tone as inferior. There is still a bit of a thinning of the bass though if you ask me.
As for the Phat Cats, they work a lot better in a Strat than they do in Gibson styles guitars, some people on this forum have had less than optimal experiences with them in a Les Paul.
I don't usually recommend a DiMarzio over a Duncan, but in this category I'd look towards the Bluesbucker first to fill the same role.