You have a decent cooler already according to the reviews I saw about the Aiolos. What do you need it for?
The helpful side says "If it's $20 or $30 off the MSRP, go for it...if not skip it."
The cynical/elitist/frugal/minimalist side says/asks the ff:
Are you OCing? Are you using this as a stepping stone to full custom loops? Is the heat too much for the CPU? Does your system really NEED it?
Because according to your sig-rig, you only have one rig and not even using stock CPU cooler. So you have to ask yourself "Why do you need it?"
Honestly don't do it until you have a new system coming from a stock cooler.
Then again, it's your money and at the end it's your decision.
If you're going 5ghz better get a full custom loop. :/