Blackberry Bold 9700 vs. iphone 4?

I can't decide wether to get an iphone 4 or a blackberry! I would get the blackberry bold 9700. Im a teen, i like to text, and i like to be able to get on facebook threw my phone. I have a crappy samsung impression right now that always breaks. My dad said for christmas I can either get the bb bold or the iphone. he wants me to get the bb. right now for at&t they are both $200. I am leaning towards the blackberry because it seems like a good phone, but i've wanted the iphone forever and Im afraid i will be angry with myself late if i get a blackberry when I could've gotten an iphone. what do you think I should get? i can't decide!