Playing .09s is admitting that you are a pussy
HAY F U N00B I HAET U
Well, he IS right, Kim.
Personally, I'm currently using string from a danish company called Stringsite. The cool thing is, they let you put together your own combination of gauges, and it's dirt cheap.
I've had the strings on my Les Paul and my sevenstring for a few weeks now, they still sound totally new :O
For the Gibson, i rock a set going 11 14 20 30 42 52, and for the 7-string, I go with 10 13 17 30 42 52, then with a .65 bass string for the low B. It works extremely well.
I've used D'addario's in the past, and I've never really understood why anyone uses that brand. They don't last half as long as Ernie Balls, and they have zero brightness in their sound compared to other brands. Pretty much every brand out there whoops their ass completely on all fronts, but still SO many people use them?! I don't get it.
EDIT:
The Gibsons are tuned down a half step, the seven is kept in standard. I do not like floppy strings, and a lot strings tend to get floppy because of my picking attack. I've been known that pretty much any guitar buzz like hell, if it's set up for low action. That then means I have to use sorta high-ish action and heavy strings if I want a decent sound. No alternative for me.