Careful with getting strings so thick they won't fit in the slots of yer nut. At the least you
might get some buzzing/dead strings and at the worst they
might break the nut (as happened to me recently after going to heavier strings). They may fit and play just fine, and as mentioned are recommended for playing dropped that low, but just be aware. As far as string brands, I'm not picky myself, but by slight preference and habit I generally use Ernie Ball.
[FONT=Palatino Linotype]"Bust a nut!" - Dimebag
"Imagination is more important than knowledge." - Einstein[/FONT]