WEX, no idea.
Sigma 50, next few weeks I believe.
17-40, it should work ok.
Get the largest and fastest size you need and afford. I have 64-256G cards.
UHS-2 is worth it only if you shoot loads (like 40 shots) in a row.
Thanks. Or general availability at any place would be good to provide a general idea if you know? How long did it take for your one to arrive after ordering?