Best Value Prepaid or Short Term Postpaid for $80/Month

Hi guys, my work is allowing us to expense up to $80/month for a mobile phone plan. I am currently on Belong and very happy - paying $10/month and never worrying about using internet while out and about (thanks to getting a few free sims during that deal two years ago or so, and adding the data to my balance and still having plenty left in the bank to this day despite giving some away to various people). Is there any way to spend $80 in a way that helps me? I was thinking of signing up to one of those jb hi fi or Harvey Norman deals with vouchers for being with telstra, but I don't want to commit for 24 months in case I want to have a baby at some point and will be off on maternity leave, I don't think they would still pay for my phone then (ostensibly it is to have access to internet while at client sites). How dumb would it be to pay $80 out of my own pocket during that time when not only do I not need that much data when out and about but I would be at home 99% of the time too! If there's a deal that will get me a phone I can sell (or give to a family member), or a voucher, where I am no more than $10 out of pocket a month and commitment not longer than 12 months (6 better) that would be fantastic. Does anyone know of anything? Doesn't have to be an actual deal, can be a normal price if I can be better off than just claiming the $10/month I currently spend on my phone.