PC Pro have just done a roundup of AV software both free and paid for -
clicketyNot sure if they've uploaded everything they've tested yet but the reviews will all be there eventually.
Best paid (in their opinion) was Kaspersky 2015 and best free was Avast. MSE let through about 40% of the malware they tested so didn't score too highly.
I've got Kaspersky and it seems fairly unobtrusive and as far as I can tell it works well but I guess you never know until it actually finds something.