Amazon does provide a song matching service so that not every single tune in your library will have to be uploaded.
Quoting from Amazon..."Music that is matched to Amazon's eligible catalog by the Amazon Music Importer will be delivered to your Amazon Cloud Player as a high-quality 256 Kbps MP3. This feature may not be available for all content in our catalog, as eligibility may be limited. Eligible music includes songs that are available in the Amazon MP3 Store catalog and for which we have rights to provide this feature. File formats supported for this feature include non-DRM MP3, AAC, OGG, WAV, ALAC, AIFF, FLAC, and MPG audio formats."
Of course most of the electronic music we here at the forum listen to won't be matched because it's not in their content library or part of the copyright agreements they've signed with Sony, Universal, Warner, etc.
I'm pretty sure that John Tesh - Live at Red Rocks is owned by Universal so you should be good for matching with that one.
However, all your Tesh bootlegs probably one be matched.