I have Canon S5IS and enjoying it.
Canon has launched PowerShot SX200 IS @ 23,995.00 recently. It also has 12X optical zoom but is more compact (with 12 MP). The battery provided with it (PowerShot SX200 IS) is not as good (only 280 pics) as that of S5IS (around 450).
Moreover, canon has also launched SX10IS and SX1IS in past which supports a wooping 20X optical zoom with similar features (SX1IS supports full HD while SX10IS doesn't). The price of SX1IS is INR 36,995.00 and SX10IS is INR 25,995.00.
If zoom is the only criteria then also look for Olympus SP-590UZ with 26X optical zoom or Nikon Coolpix P90 with 24X optical zoom.