So, I need some help...

Later this summer I'm participating in an exhibition along with several other photographer. As you see in this photo, there are 6 photos and 5 of them (or 1, 2, 3+ new ones) I'm going to have with me. The help I need is some input to which photos looks best together, and if they are good enough to have at an exhibition.
One of them is already decided and that's photo with the droplet and sun sparkle. The way I see it, they make two groups of 3... or two groups with 2 in one and 4 in the other. It's really difficult, and sometimes I think I will just take new ones.
I would really appreciate your input. :)
What do you think?