I recommend the Rosewill Capstone 650w powersupply. I may get flamed for recommending Rosewill but the Capstone is a really good series. It's also 80+ gold and give you plenty of headroom for future upgrades.
Is that available in India ........please if u can help me choose a psu from flipkart.com. Sry I forgot to mention this in my 1st post ..... And thanks for reply