I pretty much do that for my MP3's anyway, I don't trust CDDB nor like that it must have been filled by either one busy moron or a lot of people who don't like capitals or know how to spell or put the year in the comments section.
Question, I think I know the answer to this but anyway, since MP3's are a lossy compresion & once the segments are lost that's it. If you convert a MP3 back to a .wav then re-encode at a higher rate, is it any better than the previously lower encoded rate, given the same encoding parameters as was the original file?
My choice would be straight .wav files on my empeg.
#695-Mk2/Many pretty faceplate colors-12Gig/TUNER-anxiously awaits v2.x & VR
"No buyers regret"