Hands down, the best pastured butter that I've ever had is Trickling Springs Creamery (Chambersburg, PA). Then, it's a toss up between Kerrygold and my local raw butter which, interestingly, are the same price. My mother totally agrees with the TSC followed by Kerrygold, and reminds me every time I see her that she wants me to bring her 10 lbs of Trickling Springs the next chance we get to go to Chambersburg even though I bring her a half pound of Kerrygold almost every month. :-)
She's never had my raw butter, and neither of us has had Smjor. WoodStock Farms and Natural by Nature are good, but neither are totally pastured, but they're both cheaper so I buy them for bulk use.
The Amish Roll butter in my local Amish natural foods store looks yellow enough to be pastured, and it's a lot cheaper than the others, but I haven't asked yet if it's pastured. OV pastured butter isn't available in my area, and I've never seen Anchor butter.
ETA: We have a trip to TSC planned in a couple of weeks, but in the meantime, I thought ya'll might like to see my local farm's raw butter. The raw butter is in the small container (I separate it so that I don't have to thaw it all at once), contrasted with a bar of Kerrygold. Sorry- I can't get it to load in my comment. Here's the link: http://wordvixen.com/?attachment_id=1053
