One question to determine the list of possibilities before this thread becomes a mirror image of most war room threads:
What features are you looking for in the Internet Security Suite?
As you know, most will not have the features KIS has, so you will need to break down to see what you will use, as well as some will have other features KIS doesnt have.
If you simply want FW, AV and some zero day components, it will help narrow down the choice, as well as your budget.
Additional factors:
Scan speed
Boot time
I/O
RAM Usage
Protection module usage (do not get mistaken with detection rate)
What type of zero day protection (HIPS, BB, HIDS/IDS)
Of the top of my head, Free: Comodo Internet Security, Paid: ESET AV + Windows Firewall or AVG with Windows Firewall (you can always switch to Comodo Firewall) or avast! if you do not mind the current issues.