That's a damn fine looking list. I cannot understand why people like King Crimson no matter how hard I try, let alone well enough for In the Court... to place at #5, but otherwise, looks great to me.

For anyone starting from nearly-scratch with popular music I'd recommend a chronological approach to lists like this. Don't start at #1—cut the list off with however many you're willing to commit to listening to, then order them by release date, and start at the beginning. For the earliest entries consider hunting down the major influences on their genre or a couple major popular acts from the preceding 10-20 years before them to get a sense of where they came from—maybe a few tracks of ragtime, a crooner or two, a couple big-band acts, some early and mid-period jazz, maybe an album of "standards" or something, a small selection of early rock. That's a decent set-up for starting on 60s-and-on popular music, which is mostly what these lists treat (Kind of Blue is almost always the highest-ranking exception to the "60s and later" rule)

[EDIT] incidentally, I don't see a CSV or Excel export option for the list on this site, even in the list of "subscriber" features that I could unlock by paying $15. I am entirely certain I'm not the only person who needs my lists to end up somewhere like that so I can mess around with sorting, checking-off, and so on :-)