Kashif... it helps if you get as specific as you can when deciding these things. You can help us give you a better idea if you clue us in to how you play, how well you play, WHAT music you play (this one is probably more important than any other), what arrangers have you played in the past, etc. etc..

Otherwise, those with Korg's will say 'buy Korg' and those with Yamaha's will say 'buy Yamaha', and you'll be no better off than before!