You might try reinstalling your stock cooler. Make sure to clean off the old thermal paste and use some new stuff. Those temps say to me the cooler is incorrectly installed. At least make sure all 4 of the mounting posts are securely locked.
I don't get Tom's "evaluation criteria" .... they "rate" the coolers based upon cooling per dollar cost of the cooler which frankly to me makes no sense.
What are we evaluating here ? The ability of a cooler to keep itself cool or the ability of a cooler to keep the entire system functioning at a safe operating temperature when overclocked.
If my cooler limits my overclock, then the "user experience" I get from my entire system is impacted. If I can get my system to go 5 % faster or cooler, then that should be evaluated on the basis on the cost of my system rather than the cooler ?
A cooler with twice the relative performance at twice the relative price is considered "equal" to an average performer at average price.
Since this is the criteria for all testing ..... perhaps it would be better said this way. Ya have ya dream system put together but haven't as yet bought ya video card with $1800 invested so far, for arguments sake let's say ya can get 30 fps with a $200 GFX card or 60 fps with a $400 GFX card in ya fav game.
Do ya look at it as twice the performance for 100% more money ? ($400 / $200)
Or do ya look at it as twice the performance for 10% more money ? ($2200 / $2000)