I'd have to second rambo's recommendation. I think one of the reasons all the carriers went up is to gouge people for the move to smartphones. I can only imagine what TMO is thinking, but when you look at what iphone users pay, they might be jumping on the bandwagon. Sprint has lowered prices to draw customers in. I did the research when my contract was up and I stayed with sprint because they had the best thing going for the BB at the time, and still does for now.
I've got the everything data family: 1500 minutes with anytime mobile, unlimited everything else, 129.99 for 2 phones, and a 14% discount because I work for the city.