As you can see from the multitude of responses, this question can only be answered by you! The rest of us can only offer suggestions based on our own perspectives and biases.

As for providing input, I prefer smaller for concealed carry and since you have K-frames for more power, and since you have history with the -7, the arguments pile up on the side of selling the -9, from my point of view. But again, this is your very personal choice to make.

Froggie