HTC wildfire or Blackberry curve 8520?

I was offered to contracts the HTC wildfire for R100 pm(i live in south africa) and you get 30 megabytes enver 3 months. Then there is the blackberry curve 8520 for R130 pm and you get 130 rand pm and freed BIS. I like the idea of BBM because all my friends have blackberries but i want a phone which i could surf the web with and watch you tube videos, but since i only get 30m a every 3 months with the Wildfire i dunno which to get.