The pink fabrics don't match the rest of the quilt.
The back ground color is very nice - do you have some more of it?
The other two might be ok with a strip of each.
I really like the aqua color in the quilt - do you have some more of that?

I'd go with a bright yellow

I agree. The red was the first thing that came to my mind.

I am not sure of your border selection. Of the four, I think the bottom one is the best one for me.

I, too, am not crazy about any of them. If pic colors are true, I would probably choose a yellow/gold, or orangy/red. I feel your delimma though. Best wishes for your decision.

The patterned one on the bottom. Why? Because it seems to belong with the quilt. My answer and I am sticking to it.

Bottom border gets my vote!

I agree with Tartan. I prefer a solid border but in an orange or deep red (not a bright red) colour. JMHO.

Viva la difference---my choice is the pink floral.

Multi-color on the bottom suits my eye best. You could also use that stripe as the binding on the bias!