After much research, I bought a Vortex Sparc w/ a 2 MOA dot and have been very pleased with it. It is rated to handle a 375 H&H's recoil and a huge plus is that it comes w/ several mounting options included, lifetime warranty, and won't break the bank. The Red Dot is bright even at it's lowest setting, holds zero, and is an extremely tough little Red dot. The Eotech and Aimpoints are great and of high quality, but will come with a higher price tag. If I were not going for the Eotech or Aimpoints my choice would be the Sparc. The Bushnell TRS-25 is another you may want to look at with good reviews, but I don't know about it's toughness in handling prolonged heavy recoil. If you want to go with a reflex sight Burris and the aforementioned companies are good as well.