Just to throw in my tuppence worth:
I hated those Primark fleece tights. Awful. Poor shape, not enough elastane, went baggy at the ankles, Ã la Nora Batty, slowly creeped down during the day so I was doing the secret/not so secret hoiking up of tights all flipping day.
Tesco did some nice ones last year, were they called Velvet or something, but they did go a bit ball-y.
So after extensive expensive buying of cheap mistakes searching, I am now the proud owner of Falke 100 denier matte tights. They are fab. Not the tiniest bit shiny (I don't like shiny), size down rather than up, they are generous. I also have a Wolford pair, and they are also v good. I reckon that will do, wash one, wear one.
I have seen M&S Autograph 100 ones with the sucky-in control top thing for not so confident days, or the days when there is no ignoring those buggeringly stubborn saddlebags. Or I should say SADDLEBAGS. They also do a merino one which I thought looked very promising indeed.
That ^^ was rather more than tuppence worth. 