[quote name='chriswareham' timestamp='1406638505' post='2513263']
If you want to drop tune and not have the E string go flappy, then I can recommend Circle K strings. Took me a few minutes to get my head around the table of string guages on the on the Circle K website, but they make strings for all manner of tunings that maintain an even tension across the set.
[/quote]
DR DDT strings are good too, they seem to magically retain a lot of their feel and compliance when you tune down and/or back up again!