Hi Everyone, I am just getting back into playing bass after many years away. Getting ready to pull the trigger on one of the Genz-Benz 500 Contour units on closeout. I am a classic vibe kind of guy, Motown, Beatles, etc., currently playing flat wounds only on my MIM P Bass and my Rogue Beatle bass. Do I want the 1x 15" model or the 2x 10" model? Thank you!