Proforged, hands down.
Is this for a 87-91 blazer?
Double check the part numbers but this should be a match.
+1 on the Proforged or of course OE. They hold up very well, good boots and very corrosion resistant compared to other brands. Just last week I had the chance look over a plow truck I installed the tie rods, link pins and ball joints on 3 years ago and they look good with no rust and are in good condition, all sealed parts no zerks.
These are Taiwan made and high quality.