I've had great luck with Pearl Izumi. My first purchase was a pair of winter running tights from them in 2007. They're still going strong (some pilling in the crotch, zipper pulls broke). Sadly PI discontinued their running specific line a few years ago. Also have some ASICS running shorts that have held up for over a decade (less use than the tights though).

My experience is that the stuff that's meant to be comfortable for casual wear is generally not going to last. If you want something super thin and stretchy, it won't be durable. I'd love to be proven wrong!