No, Brian, I haven't seen all of the contenders. I've seen The Shining, FMJ, Lolita (or bits of it - I fell asleep), Dr Strangelove (very good in its time), and A Clockwork Orange (also good in its time, very inventive, blah, blah), and yes, of what I've seen, I prefer Space Odyssey. I'm not sure that I saw Eyes Wide Shut - might have, mightn't have.
I didn't realize that it was mandatory for pollsters to have seen every film Kubrick made, possibly five times over, to form an opinion based on the offerings. Several thousand people didn't see all of RED RUM's or BEST MATE's races, either, yet they still became the most popular chasers of their time. What does one have to do - turn into Mark bleedin' Kermode in order to be allowed to voice an opinion?