Difference between 16-bit and 24-bit sound

[Half-death]

Any noticeable difference, especially with cheap speakers like the Inspire 5.1 5100?

Upgrading tomorrow so I'd really appreciate a quick answer to this.

Also the difference between 91db and 100db

And finally between 48kHz and 96kHz sampling rate.

Oh, very very lastly... EAX 3.0 and 2.0

(Please don't mention Audigy or Audigy 2... they are out of my price range and on top of that, i won't be using this upgrade for long. just a temp. I'd just like to know if the differences on top are noticeable) THANX!
:cheers:

 

[richpull100]

16bit= cd sound
24bit= dvd sound, recording studio sound

100dB signal to noise ratio is better for recording professionally, but you probably wouldnt notice a difference in playback.

96KHz sampling rate is used in professional apps as well, but I dont know about the difference in quality/clarity.