I don't know how long you've been using AVG, or if you experienced any problems with it in the past. I wouldn't discount it, because of this one incident. Sometimes a "second go-around" is necessary. It's entirely up to you, whether you wish to make a change or not.
IF you do wish to switch, the more popular free A/V's are:
• Avira Free Antivirus
• Microsoft Security Essentials (MSE) - Should you select MSE see: "Checklist for installing Microsoft Security Essentials"
• Avast Free Antivirus
Lastly. You mentioned in your original post, "AVG didn't protect me well enough". You can't expect any one A/V (or Anti-Spyware), to protect you 100% of the time. It's why we use "layered" protection. More importantly, there is no software capable of protecting you against the actions you take. A well worn expression, but true.
Glad to hear all is well