One thing to point out is that MSE is antivirus only, not a suite. That said, MSE is ok. It is getting decent reviews around the web. I have tested it and can recommend it.

Beyond that, IMO, since version 8.x (now up to 9.x), AVG is no longer something I can recommend.

For my own use however, I use and recommend free Avast. Good, unintrusive protection.