"If you have other services with Rogers, you can usually negotiate a 20% discount overall which would bring you under $40 if you agree to stay with them for a while (talk to retentions). If you have TV (and/or other services) with Rogers, by removing internet you may be affecting your overall bill and not save what you think if you have discounts now."
I understand what you're saying, and I called them and they can only offer me 10% discount. I have Cable, Cell, Internet.... you get 5% for two services, 10% for 3, 15% for 4 and so on...
so even with the 10% discount, still alot cheaper to switch, after the modem purchase (pays off itself after 8 months or so) and for $10 less a month I'm getting 300GB cap and not 70, and if I switch my cell (currently paying around $65 a month for data and text and who know what else, lol) well I can get WindMobile for $40 unlimited!
So ya, be worth it to switch.