Rental Cars

I am new to Bangalore and we are planning to hui to Mysore and Chikmagalur next weekend with family. We need a rental car (Innova) would be great as we are a family of 7 adults. We need the car for 3 full days from 22nd morning to 24th till evening. Please would be greatful if someone provides numbers of good rentals who are not kannadiga biased.