Organizing a Small Gallery Wall

We have a gallery wall of family photos in our basement, but I've been wanting to add a gallery wall somewhere in the main living room. The perfect place may have been staring me in the face this whole time - this a side table sort of divides the dining room (to the right) from the living room (to the left) in our open floor plan.

I have just a few pieces of sentimental art I want to play around with and I'm definitely going to adding more.

I mocked this up to play around with the placement before I go putting holes in the walls. 

The large white frame is a watercolor of our sweet dog, by my friend Anne, it is precious! The blue and green is a painting by my sister, I think I kind of stole it, but it's been on this wall for a while so it's mine now. The colorful gradient was the color palette for our wedding. The tiny square is a little dog, my Mom got it for me and a cat for my sister this Christmas. And the cross is meaningful in and of itself! It's also part of a family tradition - every Christmas my Mom gets a new design made, as gifts for family friends, from Hog Hill Pottery.

So which one do you like better? I can't decide!