Eset Or
Bitdefender Thamai hondama
Kaspersky nam pc ekata daannawath epa .. Virus guard ekak patten KIS uparimai .. but PC eke anith weda serama slow wenawa ,
Shortly KIS 2010 (KIS7 was good) is a shit .. Go for Eset or Bitdefender ..
EDIT :
Eset has a very good scan engine & virus data base .. detects viruses instantly .. & never slows ur PC ..
Eset can be installed in PCs that have 256MB of memory yet the pc runs smoothly

those are the specialties of it & they cannot be overtaken by KIS or Bitdefender