This is an answer to everyone asking this question - try to get as high a GMAT score as possible. See it is not like you can say "Okay I have 2 options with me. Study for 1 month and get 670. Study for 2 months and get 710". Not matter how much you study at the end of the day (to quote a cricketing phrase) GMAT is a great leveler.
If you still want an answer I would say around 730+ with your profile.
hi,i have prepared for gmat..but i want to give few practice tests,can anyone guide me how to do practice tests