[bigshot]

I don't think that remastering matters a whole heck of a lot in classical music. It's usually mastered pretty well, so any improvement is liable to be minor. That doesn't apply so much to stuff that wasn't mastered particularly well in the first place (Bernstein NY or Stravinsky conducting Stravinsky on Columbia).

 

[bigshot]

Remember, "remastering" can mean just adding more tracks to a disk with the exact same sound quality. The complete Karajan box sets are LP jacket versions, so they have been "remastered" to have fewer tracks than the ones with filled up CD running times.