I would suggest thinking about OZ if you want to stick with *A, as it is easy to get *A Gold status at 40k miles.....their burn rate is not great and I do not know about award availability....but your status lasts for 24 months and you can get lounge access/preferred check-in with all *A. BD is also very good for low thresholds and has a better burn rate than many others. I gave up on UA early last year and now have *A Gold with OZ....I have ended up in E+ every time I have flown UA on the back of that....(not that I rate E+ on UA being worth much of anything). Just my opinion....good luck deciding....