What card should I get next? I looked at the flowchart and still can't make a decision.

I am looking for a card with good bonus miles, or possibly hotel points. The wife and I want to take a trip (out of LAS) and would prefer it to be overseas.

My current portfolio is-

Chase Freedom Unlimited (28k) United Mileage Plus (24k) Amex Everyday (32k) Citi (13.7k) Discover IT (11.5k) MLife (14.5k)

And a few other smaller ones. I'm thinking Delta or AA branded card? Maybe Hilton Honors? I just can't decide.

I think I'm right at 5/24. We put our biz expenses on our personal and split approximately 200k yearly between Amex and Chase typically. Thinking I should go with one of those two companies due to our existing relationship?