Looking for a travel/miles credit card.

My wife and I are going to Barbados in November. Looking for a new card with
Good sign on bonus for these flights.
We live on the east coast and travel 1-2 times a year. I have heard ways of being able to fly first class by transferring points.

I have 9 current cards, my wife has the Chase sapphire preferred, which we have used in past. We also have a Chase southwest card.

My last card opened was over 2 years ago and credit score is around 750.

I have been looking into the venture/ venture x , but wanted to see if you all had any suggestions.