I don't think necessarily that the best award is what would cost the most- really now- how many people would really buy a RT in F from N AMerica to Africa for $10,000! WHy not buy a RTW?? I think the value of the miles you redeem is at the point where you would prefer to use miles opposed to buying a flight. Ex, if you'd BUY a flight from JFK-LHR in F for $1,500, but would spend 100k in miles if it was $1,501- then those 100k in miles are worth $1500 to YOU. Therefore that trip your miles are worth 1.5 cents each- though it may vary from time to time depending on your disposable income.. Just my 1.5 cents worth