The Yamaha R3 is a proven and reliable choice in your budget, and with the new GST rules, it has become more affordable. Another capable, though slightly pricier option is the Kawasaki Ninja 500. The Ninja 500 builds upon the strengths of the Ninja 400 and should be a capable machine. Both these Japanese sportbikes are likely to last you a long time without any hassles (provided you service them regularly) and will also stand out on the road owing to their low sales volumes.