Very nice speakers!

The options are specific model numbers for Audioquest's stuff. The ones you listed all appear to all be spades, with various wire gauges and binding post sizes supported. The "S" at the end stands for silver (a "G" would mean gold). Unless Paradigm has changed since I got my Studio v2's, they use a large binding post (the 5/16" I believe, although it may be a 1/4") - your dealer could confirm for you, but if they are 5/16" then you'd want to use the 1056 or P8M as those are the only ones that will work with a 5/16" post.