Unless you have a very early morning flight out of ZRH, dayrooms at the airport are rather basic and not a good value for money.

I usually stay at the Hilton and often get upgraded with lounge access as a Gold. I even got upgraded once from a room in the Apart Hotel next door (operated by Hilton but not an HH property) to the Hilton because the former was overbooked and was given lounge access when check-in staff saw my gold card. ^