How do I update 128kbs uploaded files?

Question

I have a bunch of CDs the were previously in 128kbs when I first ran iTunes Match but I've now re-ripped my whole collection in AAC Lossless and I'd like to replace the lower quality versions in the cloud with the new high quality versions or at least the auto 256kbs version that gets sent instead of the lossless file.
I've looked all over and can't find anyone who has tried and thing similar. It would be a huge pain to manually delete albums from iTunes Match and then reimport.

Answer 1

iTunes Match does not actually upload ALL of your songs.  It only uploads the ones that are NOT matched.  In other words, if a song that you have is matched to a song in the iTunes Store catalog, the file that is already stored on Apple server is used.  That song file is 256 kbps AAC.  Your song file is not uploaded.
That's one reason the service only costs $25 per year, because most of the songs people have are already collectively stored on Apple's servers, because the same song is sold by the iTunes Store.  Only songs that do NOT match are uploaded and stored in iCloud individually, per user.
Also, this article says that song files that are in ALAC (Apple Lossless) format are "transcoded" to AAC 256 kbps locally, before they are uploaded to iCloud.
http://support.apple.com/kb/HT4914
So, whether your songs match or not, they are not going to be stored in Apple Lossless format in iCloud.