lemans,
I hear you...fwiw, my vote would be any good syn with maybe an 0W base rating for easier starting in your winters.

We did two M'cycle trips to Nova Scotia and PEI: both were in summer and both times it was "record heat" at the time, lol!

We had packed/wore leathers, Damart long undies, etc. ...we ended up stuffing all those and riding in T-shirts and jeans.

I must say the two trips over The Bridge to PEI, were white knuckle rides both times with the wind and rain on those days, and the trucks pushing us. Cape Breton ride is beautiful, as were the tidal bores, Fundy, Halifax, etc.
BR,mD