Enjoy your Extremas Malwow1. I'm glad they worked out for you. At any rate I concur with Daveyf. I've listened to the Extremas and although their bass is exemplary, the imaging and soundstage is not superior to the Guarneri Homage. What the Extremas do best is in throwing a bigger and more enveloping sound which is not to be confused with imaging which deals with spatial location of various instruments in the mix with respect to lateral and depth. FWIW the SF Extremas are warm sounding. I can imagine how it would sould like when matched with the equally warm sounding Mac. I guess you like a syrupy, warm and liquid kind of sound.
Enjoy~