It depends a lot on what type of music you listen to. Modern popular recordings are produced to sound as good as possible in compressed mp3 formats, so 128k will probably be alright for casual listening.
However, if you listen to classical, jazz, or other 'audiophile' type recordings, 128K will sound tinny, thin, and lacking in dynamics. For these types of recordings, discriminating ears cringe at even 320k (typical maximum rate for mp3). For casual listening of jazz, I need at least 192k (and sometimes higher) to get to the point where cymbals don't sound like tin foil being crumpled up.
In the end, you have to try it yourself and understand that streaming is like listening to the radio - it has it's limitations that you have to live with. If you can pay a few bucks to minimize that limitation, that's probably a good thing.
Have fun!
However, if you listen to classical, jazz, or other 'audiophile' type recordings, 128K will sound tinny, thin, and lacking in dynamics. For these types of recordings, discriminating ears cringe at even 320k (typical maximum rate for mp3). For casual listening of jazz, I need at least 192k (and sometimes higher) to get to the point where cymbals don't sound like tin foil being crumpled up.
In the end, you have to try it yourself and understand that streaming is like listening to the radio - it has it's limitations that you have to live with. If you can pay a few bucks to minimize that limitation, that's probably a good thing.
Have fun!