Sounds like the Marriott program is in your future. 10 years of PLT or better and 600 nights gets you LT PLT, which is pretty good. Their IT has its problems, but not to the extent that IHG usually has shown in the past, though they have been better lately. You can keep your Spire every year whether you stay at IHG or not, simply by paying the $200 annually (in December preferably) for AMB. Or Hyatt, though you would need $200,000 total lifetime spend for LT Globalist. Hyatt is the better chain and program, but check each to see which one works for you. Hilton-ehhh just boring properties but everywhere, and easy to get Diamond. High burn but low earn program, but there are some ways to improve it.