Am I paying too much?

Wife and I are on the Simple Choice Plan. 2 Lines for $80, tack on $20 for unlimited 4G on each line. After fees and such the bill is \~$135. Is this too much or would we be able to drop the price and still have unlimited data, etc?

​

EDIT: Forgot to mention, the billing cycle ends Nov. 6 and we've used almost 9GB of total on-network data.