Last year I went the same route - cell phone with no land line. Having realized that was a mistake, I now have both. The reasons are:
-Land lines are more reliable. There is no risk of ever having a weak signal.
-Land line phones are more comfortable. Sometimes I can't stand talking on my cell phone for hours on end.
-Mobile plans are $40+ per month. Land lines cost $20 per month give or take, and the price is fixed no matter how much or when you make phone calls. Something to consider is that once you've exceeded your mobile plan's free talk time, you will be charged 30 cents a minute. If you exceed your free minutes by just 3 hours per month, that adds $55 to your monthly bill.
If you must drop the land line, I would recommend having people over to your house who have phones from all of the major providors. Don't get yourself in a situation where you're locked into a contract with a cell phone providor, but can't use your phone in your own house.
In general, my advice is to use Rogers/Fido because they have a larger network with fewer holes. Having Bell myself, I could count on one hand the number of places where I have had a stronger signal than someone standing right beside me with a Rogers phone.
Lastly, don't sign anything longer than a one year contract. You never know when your situation will change, requiring you to switch providers. My base Bell plan is $35/month and I signed a 3 year contract giving me 6 months free. It's the equivalent of paying $29 per month every month for 3 years. Getting out of my contract now is worth far more to me than $6 savings per month for the next 2 years, but I'm stuck because of the cancellation fee.