Boosting your straw poll stats, Tony, I too prefer your working title – hands down. It’s interesting, unusual and specific – far better than a generic title in my opinion. I would pick it up to see what it meant, if nothing else, whereas I wouldn’t even glance at Limelight, I don’t think.
I also like ‘improbable’ as an adjective – again it’s specific and would make me want to know how it was improbable. Whereas the other ones are generic and much-used – also subjective, as someone’s else’s ‘amazing’ etc might not be mine, whereas ‘improbable’ is just that, wherever you’re coming from.
and no to ‘unrelenting’ from me – negative connotations!