150-200GB would be a typical month, but I've done under 75GB (which is technically my "cap"). Last month I did slightly over 1200GB. I've never been charged any overages, and I'm paying about $65 after tax for a 60mbps/10mbps cable line that, so far in the few years I've had it has never seen any downtime or slow periods (with exception of 1 wiring issue in the building, not an issue with my provider).
TekSavvy is pretty good, but there are some other great resellers out there too. The situation is pretty dismal for interwebs in Canuckistan, so you have no choice but to go with one of the resellers. They are better, but still a lot. At least I get unlimited 2am-8am transfer, so it's easy to just schedule torrents. But still, I've done huge amounts of download outside those hours and they never seem to bill me for it, so I dunno. I really can't complain.
There is development with fiber to the premise, but the major telcos are charging an arm and a leg for it. So until we get fiber competition (google fiber anyone?), things not likely to change from that perspective up here.