I'm using Kingsoft, just to try it out. I switch between that and Comodo Security Suite.
So far Kingsoft has been great, but I haven't used long enough to thoroughly review it.
Gotta stress test it a bit which I've done with Comodo and that's really been my main for a while.
Both have cloud based virus and real time protection which is good.
I haven't bothered with pay suites considering it's no longer a necessity with so many decent free alternatives out there.
I use a subsidised version of BitDefender. Seems pretty good so far, the remote management is good, and there's no slow down on my system. It's a bit of a pain when it quarantines cracks and shit, but I usually download that stuff to an exclusion folder.
Just because you don't download something, doesnt mean you are safe from drive by infections.
Avast and MSE are probably my favorite free ones, and most people dont need huge suites to protect their computers. If you need a suite that has extra power, ESET NOD32 is good, so is Kapersky. I believe Kapersky has gotten odd over the fast few months or so though.