Men Kurta/Suit option for a family function at Lunch time. Give suggestions

Am confused between Suit/Safari/Shervani or any other modern outfit and the place to buy them in Chennai this Saturday. Kindly give suggestions for a 13 year boy and myself (Adult) matching outfits to wear for a family function at a 3 Star Hotel with a gathering of 150 members. Budget 10k for both of us.