Thanks guys for the replies...
I planned to use it for my home studio (3 PCs, HD TV, Home Theater Speaker setup etc...Aroud 2000w). 5KVA is enough, since I don't connect ACs...
And I hope APC don't have that in India. (1200VA is not good for me, atleast 4000VA)
I enquired a local shop and they quote 'FISHER' 5KVA Servo stabilizer for 9k.
Anybody heard about 'Fisher' stabilizers? Or do you know any other brand in India?