I have the Delta Amex Reserve. It is even better now ever since Delta changed their status thresholds and its built on dollars spent -- so less people qualifying and clogging up the skyclubs. Plus gets me access to the Centurian Club. I also only fly Delta for work, and since it is not a cost to me, I do not have to worry about it being pricier and shop around for the best price. That may not be the case for you, and if you are not loyal to a specific airline, you should not go with an airline tied card (obviously). But if you are travelling enough, I am not sure why you wouldnt pick an airline and go with them exclusively. Over time, the benefits far outweigh the potential cost increase, even if you use them for pleasure and not business at some point.
All signs point to Chase Sapphire Reserve. I'm coming from Chase Sapphire Preferred, which I love.
I travel a decent amount, various airlines, really want lounge access.
I've researched Amex Platinum, doesn't really scream better than the Reserve for my use case.
Any others worth looking into? Or should I just fucking do it an not overthink?