So Hitman: Absolution is $10 (75% off) on GamersGate
(for another 5.5 hours)
I'll just add that since you'll pay for currency conversion anyway (to USD) why not pick it up on gamersgate.co.uk where its selling for 5 pounds ($7.50 AUD instead of $9.70 AUD).
I nabbed it for blue coins, where its also 'cheaper' from their uk site (like $5 worth of blue coins cheaper).
I watched an incredibly annoying Australian let's play of a couple of levels. It looks pretty and a little bit simplified, but still fun. It seems to have 'purists' upset over it on the Steam forums, but how rare is people complaining on the steam forums?
As you say... you can always go back and play blood money or silent assassin again. I've still got Blood Money in my library, unplayed. I'll play it after Absolution and maybe enjoy it even more.