BlackBerry Curve 9320 is 100mb enough, and BlackBerry Curve 9320 or Nokia Lumia 710 ?

Im thinking of going with WIND and i dont know if i should get the BlackBerry Curve 9320 or nokia lumia 710, i want to go on normally check social networks and i dont know, i don't want to spend too much money on a plan every month, with the BlackBerry Curve 9320 im going to go on the 25 dollar plan with 100mb data, unlimited text and local talk but if i go with the Nokia lumia 710 then i get the 30 dollar plan and it has unlimited data, talk and text.... which one D; and is 100mb enough for the BlackBerry Curve 9320?