I will disagree on you with that RE: the added detail being in the bit depth. It's in the sample rate
There is actually no real audible difference between 16-bit and 24-bit recordings at the same sample rate, it's just a myth. It's the sample rate that matters.
Analog sound is a wave. The digitized version tries to approach that as closely as possible. A CD has 44,100 samples per second that try to produce the sound of that perfect wave. So go to 88.2 KHz and you have 88,200 samples trying to produce the sound of that perfect wave. And the more samples per second (the sample rate), the closer it will sound to that perfect wave. So basically, a higher sample rate is a higher resolution.
The bit-rate (16-bit vs. 24-bit) has nothing to do with added detail in the music. It's only necessary for increased dynamic range, but since most music is recorded at a max of maybe 15dB of dynamic range (and going from 16-bit to 24-bit adds about 48dB of dynamic range), you will hear no difference. All it does it take up more disk space
This article explains it in more detail:
http://www.head-fi.org/t/415361/24bit-vs-16bit-the-myth-exploded
In short: the higher the sample rate, the better. But a higher bit-rate than 16-bit makes practically no difference.