Putting my Tone Zone into the bridge of my SC420, tuned to D standard. Playing progressive rockish type stuff.
Was previously thinking Humbucker from Hell, but I'm afraid the output difference would be a little more than I'd like, by the looks of it. I need a lot of clarity out of it, because I'm slowly gravitating to the point where I prefer singles in the neck (hence why I was looking at the HFH).
Try a gravity storm. deadly neck pup.