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Yay, it's pretty uncommon for somebody to pick up 10,000 and like it without having heard other Tool stuff as 10,000 is one of the most difficult to get into IMO. If you like it though, most definitely check out Lateralus next.
I did find it a bit difficult to get into (probably because almost every song is over 6 minutes long) but it's just a really well done album in whole. I especially like Vicarious and The Pot.