It looks like a digital transfer of an mp2 source to me, so it's almost as good as it gets indeed. The only better form would be the original compressed mp2 stream that was broadcasted (or maybe an uncompressed analog broadcast - which would not necessarily be better, mind you -, or indeed a pre-broadcast source, if those things exist).
I'll leave answering the "is this good to seed" question to a mod.. 
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