Thanks for all the advice so far.. and keep it coming.

I am actually thinking of bring my laptop case ( its a soft side case that has a "2 days of clothing" compartment )

Between that and my small carry-on I think I will be ok.

I will be wearing/carrying my coat on the flight and will wear my heaviest stuff I think.

In the end I could always check it ( but it just makes life so much simpler if you carry-on )