Dunlop Tortex were my pick of choice, only I found after I developed improved sensitivity in my right (picking) hand, I wasn't getting the feedback I wanted and was looking for a thinner gauge pick but with the advantages of Tortex (low friction, long wear . . .) I went so far as to call Dunlop to see if they offered Tortex in anything < 50 mm - the didn't. So I tried Sam Ash's Delrin light gauge and they gave me exactly what I was looking for, for less money. Win-win. Great product, great price.
Central Massachusetts, U.S.