These new formats are great for surround but don't waste your money on stereo discs. The human ear can't make out the 44,000 frames or the 65,000 steps of dynamic range in a standard cd so you won't be able to hear the increased frames and range in these new fomats. So why do some sacd discs sound better? Actually they don't, it's just a trick. Sony has a "data sheet" for mastering sacd disc's and it includes suggestions to do alot of boosting. Whats that mean? The EQ is cranked up a little more on a sacd, giving the illusion of better sound, which sells sacd players. Buy it for the surround (which is great) but don't bother with the stereo disc's.

Oh and don't think sony are bad guys, Dolby, DTS, and every other company that sells an audio format have there "data sheets" too.