So, I currently have the Amex Delta Skymiles Gold CC. I noticed that they have an offer of 10,000 MQM's if you spend the $450 to upgrade to Reserve. I'm currently just over the 25K MQM's and barely SM. I have enough travel planned with them that I'll be close to 40K MQM. The 10K bonus would of course push me up to GM territory. Other than the published benefits of Sky Priority and more milage earnings what other benefits would GM give? How likely are you to be upgraded on average routes (I know better than to think about u/g on ATL to SLC .)? Would essentially buying gold status for $450 be worth it over silver?