I'd posted on this as well. Since I moved to ADSL2+ my usage has really increased. There's just so much more you can do.
When fibre eventually comes to my area, which should hopefully be next year, I'll be in the same situation - if I don't find myself in it before!
I watch my allowance and manage what I do to keep within it. It's a pain not having the freedom to just use the connection for what it can do.
Draytek Vigor 2710n