I have an opportunity to purchase a pair of used Cremona "full range" speakers for a reasonable price. They sound great with jazz, classic, chamber, solo and voice, which I love. But they sound too "sterile" with rock and roll - they don't swing and the bass doesn't slam. I auditioned them through a Simaudio Moon i5.3. Before I plop down a large sum, I would like to audition these through another amp. Any recommendations for a better amp for these speakers?