I might was well put these two questions/topics in one discussion, as they seem interrelated.
1) Is the Creative ZiiSound D5 the best Bluetooth speaker right now (in its price range, which is audiophile but not absurd or extreme) for the iPad?
2) Is "compressed music" as good as CDs for my daily musical enjoyment? In other words, would I be missing much if I copied my entire collection of CDs to iTunes, then sync with my iPad, then use the iPad as my primary source of home audio? If not, what's a better way? I'm reading the reviews of the B&W Zeppelin, but I don't understand what the iPod can do that my iPad (32GB) can't.