I think I'll get a PoE switch. It makes cabling easier. I did not expect the Netgear box to actually draw 18W. That's probably when it is used heavily. However, Netgear seems to have disabled most power saving features of it in a firmware update. (Lots of complaints in shop comments.)
Unify scandal reduced prices for Unify and Netgear. But it seems Unify tries a price dump (75 EUR instead of 120 EUR for a fairly new device).