After testing a few more AV at work, I decided to share some of my results. The following are 2 brand of antivirus I’ve rarely heard, which both handily handed AVG-Free’s butt in a silver platter; ie. it scans more thoroughly and removes more effectivesly.

Avira Anti-Virus
Free version is very robust. Paid version has numerous version, tailored neatly to your requirements. Fileserver? Mailserver? even Proxyserver-specific AV? No problem. Decent price too.

MalwareBytes
Ok, so not exactly an anti-virus, but an anti-malware. Yes, there is a small difference (Microsoft Security Essential is an anti-malware). Though for most home users, the difference shouldn’t be obvious, and either would work fine.
Malware Bytes is a small company, and the free version doesn’t have real-time scanning, but at what it does – removing nasty high-level malwares – it does it extremely well. Not to mention speedy scanning time.

That’s all for now, but I’ll probably update this list more later in the future.

Update:
Avast Antivirus
This one is pretty nifty to block and maintain a healthy system. I’ve used the business version back then and it was very comprehensive and customizable, yet not exactly towards the lite end of the resource meter.
Their free version however, are quite capable of cleaning and securing most home users.