How good is AirPlay for music?

Hi,

Has anyone got any experience using an AirPlay speaker dock? I'm looking for a way to play Spotify in my bedroom - I've currently got a 1st generation iPod touch which crashes every few songs when I try to use Spotify, and a New iPad. I'm considering either getting a new iPod Touch (probably last year's model) and playing over my existing dock, or an AirPlay compatible dock which I can stream to from my iPad - which would you recommend? I'd rather go for the AirPlay option, but is it reliable enough?

Many thanks!