If your main purpose is browsing, then Blackberry is not advised. Go for a good touch screen android phone. For your price range the best would be Samsung Galaxy Pop Rs.7899 - @Saholic
If you prefer non-android phones you have the option of Sony Ericsson txt pro CK15i,
Nokia Touch and Type C3-01, Nokia Touch and Type X3-02 etc. You can get these between 7800-8000. All good and popular models.
Btw, AndroidFan's suggestions(A70 and Mi-310) are also cool, at a lesser budget than yours.