There are about 5 Blackwidows in my circle of friends (because we're impatient and they're the only mechanical anyone seems to keep in stock around here). They're a reasonable keyboard overall, but we've run into a few little issues that make me hesitant to recommend them - sticky keys, keys that just stop working, my spacebar decided to fall apart etc.
Ymmv, but I'll be trying a different brand next time a buy a mechanical keyboard personally.
I use the Tt eSPORTS MEKA G1
There should be plenty in stock around Brisbane Rythos, try ITS Direct in QLD or just purchase online.
Even the smallest donations help keep sc2sea running! All donations go towards helping our site run including our monthly server hosting fees and sc2sea sponsored community tournaments we host. Find out more here.