OK, so let's say that I'm less than impressed with the sound quality even on lossless audio with Apple TV. The overall functionality of that device is great and I may keep it, but the audio streaming is fairly poor, so I want something else.
1 - Needs to be able to stream both compressed and lossless audio.
2 - Needs to do a good job with lossless audio. I may not get something as good as a high end CD player, but would like acceptable quality on lossless audio, something I could use in all but the most critical listening conditions
3 - Needs to be something I can can control with my iPad, so where I can browse the library on that device and hit play and have it play through my main HT system.
That last requirement is why I bought the Apple TV, but the Apple TV fails in requirement #2.
The only thing I've heard of along these lines is the Squeezebox, but I don't know much about it and it if meets all 3 requirements.