it doesn't support "fast" wireless charging that I'm aware of. It's going to be slow compared to the included charger (or most decent wired chargers). Best to use to keep it topped off, or do an overnight charge.
Anyway, I'd go with a stand style charger, just because it helps line things up. I don't have the pack for the Z, but have used wireless charging on previous phones. Looks like (on Amazon) the Qi fast chargers are fairly cheap, so I'd probably lean toward one of those in case they later come out with a Qi fast charging mod, or you get another phone later that supports it. Check reviews before buying.