We have a open stairwell and three pendant fixtures. I love the look of the george nelson bubble lamps. I'd like to cluster three of them together, different heights and shapes, all size mediums ranging from the possible thinnest 13" diameter (cigar) to 25" diameter being the largest if we go with a saucer. The stairwell is 7' wide and about 9.5" in length.

Here is a sketch version, and below for the poll I'm assembled a few different layout options... which ones do you like best and why? And if you have any suggestions for the layout in terms of how to space the center of the fixtures, I'd love to hear your thoughts. Thanks!

Sizes: Saucer is 25" D x 10" H, The pear is 17" Dx 19" H, the ball is 19" D, 15.5" H, the Cigar is 13" D x 21" H