2 gigs is a LOT for a phone, especially if you use wifi at work and home. A very small minority exceeds 2 gb on any plan/carrier, and you'd basically have to be trying to do it regularly.
To the OP:
If it helps, I have 2 EVOs, my gf gets a hefty discount on the monthly bill with sprint, and I'm strongly considering selling the EVOs to pay the cancellation fee so I could pick up the inspire or thunderbolt.
You can believe the recent reports that Sprint's customer service has improved, but I have never experienced worse customer service. They've lied, broken my phones, lied again, told me to make an asurion claim for a new phone and they'd waive the 100 dollar deductible - never happened. I have no 3g anywhere near my house even though the map shows solid orange(best service) for miles in every direction.
Sprint has been an absolute nightmare... I'm not the only one... If you search for EVO glass separation, EVO light leakage, EVO cracks power button, EVO b spot, EVO broken USB port, you'll find numerous stories like mine of broken EVOs, and sprint's refusal to do simple warranty work.