OWC is the only Mac vendor I am aware of that offers a firmware updater for the OWC Mercury Extreme SSDs. OWC has a terrific line of peripherals which I buy and use. Free support. A 90 day hard drive DOA replacement policy. And a lot more. They have my vote.
Vendors like to be voted the best— it helps them, because after all, marketing is a constant effort. So if you have a favorite vendor, give them your vote. VOTE for your favorite Mac peripheral vendor.
There are some other categories too.