Hah. I just bought a G&L L2000 Tribute on ebay. Awesome guitar.
I know Justin Chancellor of Tool uses a pick almost exclusively.
AFAIK He uses Ernie Ball strings. I picked up a few packs of Ernie Ball power slinkies. I'll let you know how that goes, once I get my amp set up. For what it's worth, I think the strings that came on my G&L sound good already with a pick.