Merury inverter with 200amp battery volta info

well i allready have a 2kv hommage inverter with 2 - 190amp battery which i installed last year in september 2010 , though the back up time is ok , and i use my heavy gaming rig on it , but as load sheding times have increased i dont want the family to suffer due to my late nite gaming episodes.

what i wanted is for a inverter battery combo for my pc only - as its quite heavy setup i think 1 kv inverter with 1 -200 amp volta battery ..

i have quad gpu setup with 1500watt psu 32 inch lcd , 1 fan to run on it during load shedding only .

hence help is required