On Peter T.’s level, you would expect that all the possible choices of pots would work. But then the question becomes, “Which one works best for the feeling you want to bring out in the bonsai?”
Though all may work, the final picture in this post is Peter’s choice.
Bay Island Bonsai 
Peter, many congrats on the award!! Sure looks good with new front and new pot.
I like your choice of pot. The tree has a delicateness that comes out with that pot.
Thank you Juan!