I went with the Scythe Ninja for $40. Its about $25 less then the top-o-the-line models, and my temps are about 28C/48C gaming usage. If I use TAT to get some seriously artifically inflated temps I get a load temp of about 60C on my E4300 OC to 3.0Ghz @ 1.36V. droops to 1.33v under TAT 100% load. Personally I think my latest pressure mount mod mounting is suspect and may be giving me higher temps. My first mount, before rma of mobo, I was only getting 55C max with TAT at 100% load and same voltages.
EDIT: But I also lapped both my CPU and Ninja to a 600 grit finish. Which took 8-10C off my stock, first attemt, mounting. But its down to a 5C drop in temp now which is why I suspect my mount job. I think I may have "leaned" the HS while mounting and may have let in some airbubbles in the paste...maybe..just speculating. Just though I should mention that to make sure its kept in proper context/perspective.