DH and I both carry the IHG Premier and the Club (no longer offered) cards. I think the highest SUB I've ever seen for the Premier is 150K and AF waived. So 175K seems to be a good offer, imo. We do get value out of ours each year with the FNC, fourth night free, and we've used the TSA Pre reimbursement on both ours as well. These are cards we keep and don't churn, although at some point we may start churning the Premier...
Where did you see these new SUBs by the way? I checked Chase, and even incognito, and didn't see these elevated offers.
ETA: Nevermind, I see it on DoC.