IMO Pass and Focal's are a very nice match especially with the class A line. I would suggest either the 30.8 or the INT60 as the Sopra's could use a bit more juice but overall the Focal's are very efficient and the Pass Amplifiers put out out a far amount of current given their size. I drive a pair of 1008 Be monitors with a pair of XA100.5's and an XP20 Pre with much success.
Chuck
Chuck