We have 2 phones and use between 800 - 1200 minutes, around 1000 texts (give or take a couple hundred) and less than 500 mb of data. With that usage we pay between 58 and 71 a month. Just depends on if we are just over or just under the limit of the next usage range.
The good thing is if you are a tiny bit over, they still give you the lower rate. I think there's like a 10% grace amount they let you go over before they actually charge you the next rate. So if you talked for 1020 minutes, you'll still get charged for just the 1000 minute rate.
I don't have my bill in front of me so I can't say anything about the taxes, but I know they're not crazy.