Are you a mac or pc guy? Do you already have a wireless network for computing? Do you use iTunes?
Not a problem at all to a BeoMaster or Avant.
You will need to purchase a mini-> (2) rca lead or din to aux to connect for audio.
You could also go the Apple TV route with the Avant. You would then use straight rca leads to rgb video / rw audio. (UK: scart adapter?)
Here is a thread establishing an express in an existing mac network.