Well 8700g isn't worth buying for u coz it was a total business phone .... u can sneak a BlackBerry Pearl 8100 for 21000/- INR !
U can get the BB 7100g for as low as Rs .10000 , but again a true business phone !
BlackBerry Curve 8320 is the ultimate device as it provides rich business features along with gr8 multimedia experience .. and a true VFM handheld ! It also luks gud !
i m having all of the above models , n i suggest u to go for the Curve 8320 if u can extend ur budget to 23 or else be satisfied with the 8100 , its a nice device too !