From what I remember that combination of Eminence speakers is what Scott Splawn used to recommend before they got the Small/Big Blocks made and what he used to put as stock in the older Splawn cabs, as you've just discovered yourself
That's 1 of several pairings I'm thinking of for my oversized 2x12 cab to go with my Splawn, so I'm interested to hear how you get on with it as time goes on.