the first thing i did with it was put on my sennheiser 280 pro headphones and just casually browsed through the stock rigs, and I definitely wasn't blown away by most of the high-gain stuff. but i was impressed by the quality of the sound for many of the rigs.
i find usually a cab change really opens up the high-gain amp profiles. See that other thread that was linked earlier in this one and follow the advice about lasse and tills cabs. for tills, I recommend trying out the TillS Recto 055, 056, 059, 063, and 066. Those seem to have a bit more SM 57 in the mix and more crispy goodness. If the low mids seem a bit too round and dull, try turning the Low Shift parameter down to -0.2 or -0.4 - this pushes the low-end resonance down so that you can't really hear it and the tone gets more crispy.