At the moment I have the 2TB package from AAISP. I thought I'd actually be quite a heavy user on that. I only used 228GB last month, though, figure I am load balanced - so it would have easily been 450GB if I only had the single internet connection.
I am going to leave it another month and then probably drop to the 200GB package for a while until I am requiring more bandwidth. Already have 2.78TB quota halfway through October. If I were to go 250-300Gb a month on 200GB then that's a good number of months I could run on 200GB and then swap up to 2TB for a month or two again later on.