This thread is what I was looking for. Thanks to all for your inputs. I was initially thinking of upgrading to the Amex Reserve due to the increase in upgrade priority (especially nice for international). However, searching through the benefits, I came across Amex Platinum. I love the Gold benefits on SPG and Hilton on that card plus the lounges. So I'm thinking of going Amex Platinum instead of Reserve.
However, I do have 1 question. Assuming I will get DM every year due to my travels, is it still worth it to keep my Amex Delta Platinum?
Thanks in advanced.