Looks like for 450 minutes, unlimited iPhone data plan, it's $70 per month... then you have to add texts.
iPhone Text Messaging Unlimited
$20.00/month
iPhone Text Messaging 1500
$15.00/month
iPhone Text Messaging 200
$5.00/month
So even with unlimited texts, if you need it, it's $90 plus tax for the comparable plan but it also comes with unlimited data. Plus, my apple stock needs just a few more dollars until I have to adjust my stop sell order a bit higher.