CK Obsession for Men - in any version, this has one of the nicest openings ever in a fragrance - the cinnamon is key to it and stands out from the other sweet notes Frederic Malle Musc Ravageur - it's nice, but blended with a lot of other notes in modern sort of way. Some may find this one overwhelming due to its strength and sweetness. Halston Z14 - Along with Obesssion, this is probably your benchmark and the current version is cheap as chips. This is spicier to my nose but it smooths out after a while.
Yes, although no longer in production. Floris 1962 (also discontinued I think) is a good alternative to it and there are some bottles still around. The cinnamon in this is very well orchestrated - not sweet at all, mostly a spicy chypre.