Nothing too hot, as my Guytron already has a ton of gain. I just need something tighter and glassier than the JB that's in there already. Here's a pic of the guitar so you have an idea of what it'd be going in...

This is a VERY fat and warm sounding guitar, which I love, but it sucks for palm-muted rhythm on this amp (which is a bit on the warm vintage side of overdrive itself, but can be more modern if I want it to). I need something tighter, articulate, but still warm, without a brittle high-end. Output similar to the J.B., not sure if I really need any more since I'd like to play clean as well.
My styles of music range from death-metal to prog-rock and jazz if that helps any. I'm fairly happy with the neck pickup right now (Duncan '59), but I might try a BK there if I like whatever I get for the bridge (this would be my first BK pickup).
Thanks for the help :D
-Russ