The PAF Pro/Tone Zone is a classic combination--the
Tone Zone brings a lot of chunk.
An often overlooked possibility is to put the FRED in the neck. I don't like the FRED in the bridge--it doesn't have quite enough "balls" for me. But I think it's amazing in the
neck position--it's just a little bit hotter than the PAF Pro.
I use the FRED/Tone Zone combination in my RG421.
--B