The GHS Boomers 11-50 are my favorite Strings and I would recommend them everyone, whos playing Metal-Core (or Metal or Hardcore ;) ).
My tuning is dropped C.
There is no clashing or clanging and I had minimal work in adjusting, using them the first time.
The strings came in a 10X10 cm aluminum-coated plastic pouch. Aluminum is a oxygen-barrier, so you can be sure, that the strings keep many years in the same quality while storing. (I order more, so i get the quantity discount and play them down with the tie).
I am paying this strings for many years and I never had a bad charge.
They are consistent against corrosion and they do not tear.
(I think in five years, one time the deep C-String teared because of improper use..)
Also important are the low costs. You will not get this quality for this price with a other brand!