i have a painkiller 7 in the bridge on my modded up 7420 and its cleans are really nice, on the hot side, not too bassy which is great for the low B and very crisp. It doesn't overdrive my clean channel (5150) and retains bite when you turn down the volume, without a treble bleed mod.
i use a cold sweat in the neck & have petrucci style wiring, the middle position for cleans is sheer bliss!
i would recommend it for metal style clean cleans, its too sharp sounding for smooth lo-gain stuff and i cant seem to get it to work well for jazz tones either.
edit/hijack: pics of the mentioned axe up in pics of bkp's in your guitar