The lump I used was QIK natural hardwood lump. I only use it though when I want to get the temps going up I almost always use kingsford for the main cook. I think it is a pretty cheap quality lump, I get it for 10 bucks/20 pounds. It is really good for steak in the kettle because it does burn quite a bit hotter than normal kingsford.
Tony, I agree about the losing part, sometimes things were just not meant to work out and then you just take note of it for next time. Even when you lose the food is edible and the beer is still good.
Chris, grate temp and the top Butt was measuresd with an ET73 and the bottom Butt was measured with a Weber remote temp probe. When I switched top and Bottom buts I also switched the probes. The ET73 was always on the top (mainly because the cable is so darn short)