F&D is a good brand for entry level speaker systems. Also look for Edifier. I have Edifier C3 and it is excellent for the price. Edifier C2 is also good Edifier C2 30W Stereo Multimedia Speaker System W Amplifier | eBay
From where you bought the c3 in Kochi. I am from Trivandrum , c3 isnt available here. If its available in Kochi I will come n collect one.