I have a pair of socks made with Lorna's Laces yarn a few years agon. They are pink and white and part of the proceeds went to breast cancer research. They were a bit expensive but have worn well with no holes.
My favorite sock yarn is Patons Kroy Socks. I made two pairs and they just get better with washing and age.
I also have a pair made with Opal yarn that has lasted quite awhile too.