For what it's worth -- I've been a long time user of ESETsecurity suite, but switched over to AVG a couple of months ago due to bad ESET performance and stability issues, and have been quite happy with AVG.
It's not as configurable as ESET, and I prefer the user interface of ESET, but it's been stable and painless and i've been thrilled with the performance improvements of my pc since switching away from ESET.