At such high bitrates, it's more finding samples the codec just hates. FI, the thunder in The Fall of the House of Usher, from Takes of Mystery and Imagination, never sounds right, lossy. For something a bit newer and hotter, Garbage's It's All Over But The Crying gets loses it's layering, and become smushed. Most will be indistinguishable at high bitrates, especially if recorded and mastered well (search Youtube for Bob Katz on the loudness wars, part 3, for a neat nulling comparison of low bitrates, showing what goes on).