One of the guys I work with recommended the Pachmayr Decelerator. Is the Limbsaver better? What about Remington's R3?

My problem is that my first rifle, when I was 15 (and small for my age), was a .30-06. I developed a flinch that still haunts me (30+ years later) when shooting from the bench. I don't have any problem with my .243, but, with my .30-06, I have to force myself not to flinch. I'd like to use my buddy's rifle for a kind of memorial hunt (we were best men at each other's weddings, and next fall will be 10 years since his plane crash). I know that in large part it's psychological, but... I'm leery of shooting the 7 Mag, and thought that the Managed Recoil Ammo might be a good option.