Better quality leggings?

HI WHERE CAN I PURCHASE SOME DECENT BLACK LEGGINGS. I HAVE CURRENTLY GOT A POROTHY PERKINS PAIR WHICH ARE PAINFULLY POOR QUALITY, SO MUCH SO THE SHOP ASISSTANT EVEN APOLOGISED TO ME WHEN I PURCHASED THEM! I,VE LOOKED AT THE INDIGO RANGE IN M AND S AND THEY SEMM THE SAME AS DOES JUST ABOUT EVERY WHERE ELSE. CAN ANYONE RECOMMEND WHERE I WOULD GET A BETTER QUALITY PAIR?