@akshayt: Hey why do u need to connect speaker to the ups
When the light goes we normally use the ups for a short backup time to save our work and exit!! I bet u wont do anything else than that
Then for that purpose why do u need speakers?
Best way i think is get 600VA ups for ur monitor and cpu and an spike gaurd for ur speakers
As also as devilhead_satish said before that if u dont hv graphics card then u really dont need any extra VA's
And about the dealer i think he is trying to fool u!! You dont need a 1000VA ups for ur config