This is a true debate. I would say for internet+email= AND Phenom II4X
For gaming=I5 750.. I saw some laptops for AMD and Intel. i would go for the AMD personnaly due to price and performance. You cannot run games but, they will do good.
If your getting a Phenom II X4 for Internet and email, your doing it wrong.
Sempron or Athlon II for that.