Thankyou all for the very helpful advice!
Will have to decide between Aeroplan miles to be earned and price. Upgrades are not a consideration as I am only a lowly basic. At only 35% miles accumulation now, the lustre of flying AC all of a sudden is lessened for us non-status members. Perhaps UA or BA or AF are a definite possibility. No $5.00 Cokes for us in Paris, though. We'll be touring the battlefield and cemetery sites of historic Normandy, where our Canadian troops did us proud in 1944.
Bob.