More offroad:
Budget - DRZ400
Not on budget - WR250R
More pavement:
KLR650 or DR650 - trails are still possible, even those bikes are too heavy.
Then again, considering how much slabbing is necessary to get anywhere good in Ontario, unless you have a trailer, either one of these will be quite decent on the highway, especially KLR.
These are by far best options for what you want to do OP, since you don't wish to spend big bucks on fancy shmancy machines.
Budget - DRZ400
Not on budget - WR250R
More pavement:
KLR650 or DR650 - trails are still possible, even those bikes are too heavy.
Then again, considering how much slabbing is necessary to get anywhere good in Ontario, unless you have a trailer, either one of these will be quite decent on the highway, especially KLR.
These are by far best options for what you want to do OP, since you don't wish to spend big bucks on fancy shmancy machines.