Bama214,
I have a couple of Squeezebox IIIs around the house. They still work fine. Due to the FUD re: their demise, I am thinking of replacing them with Apple Airport Express or Sonos, neither of which support streaming hi-res files at this time.
As I see it, the advantage of the Apple device is ease and simplicity. The main disadvantage is dependence upon iTunes, although the sonic effects could be mitigated through use of Bit Perfect, Audioirvana or Amarra.
Sonos is interesting, but I see it as a rather expensive system for what it does, and the technology is becoming quite dated. It would make more sense to me if they supported hi-res, but they don't.
There are some bluetooth streaming options that have become available in the last year or so, but I do not have any experience with these. Frankly, bluetooth is a strictly an in-room (<20') technology; which is not what I am looking for.