I am flying SFO to FRA on a business class ticket that has been paid for. As you know, that route has the new lie-flat business seats. I've flown in the new lie-flat business class seats, and they are quite nice. However, for 30k miles, I can upgrade to the new first class suites. Would you spend the 30k miles on this upgrade or would you save it for an economy upgrade to business in the future? Are these new suites worth it, or is it better to just save the miles for economy to business in the future? Thanks for whatever advice you may have.