when it comes to physical media SACD is definitely it, if you're interested in PC audio, hi-rez PCM downloads are best option IMO.
Personally I prefer SACD's because they are cheaper than downloads and have both Hi-rez layer which I can play on my main system, and low resolution layer I can play on my portable player.
Personally I prefer SACD's because they are cheaper than downloads and have both Hi-rez layer which I can play on my main system, and low resolution layer I can play on my portable player.