A few things:
I'm off contract(month to month)
I just bought a moto x from Motorola.(no need for a new phone)
I have unlimited data, 700 minutes, 1500msg nationwide plan.
It costs me about 90 a month. Checking plans online I saw a new plan with unlimited talk and text with 2gb of data for 90.
It makes no sense to upgrade my plan unless I could get the edge discount. I use under 2gb of data each month. I'm really looking to try and lower my monthly bill.
I own my current phone. I bought it directly from Motorola. No contract agreement. Full retail.