Unless the music you want was recorded and processed as hi-res, then I don't see why there would be much advantage in paying more $$ for upsampled redbook quality files. That's not based on any listening tests, but if the information isn't there in the first place, I'm not sure there is any way to reliably predict whether some kind of an algorithm that interpolates what those additional "bits" would sound "better". Take this w a grain of salt, tho, 'cause I have no real understanding of the way these digital products actually work.
