Thanks for the advice everyone. If my travel schedule stays the same, I should average 90 nights at Marriott and 50 to keep Platinum at SPG. With those nights at Marriott, I should be inline for Lifetime about the same time getting the year requirement. I like the advice of being if some location I'm going to doesn't have a Marriott (or a good one therefore) then go to SPG (or vice versa).