Depending on your price range, you can go with Kimber 4PR. Is somewhat "zingy" sounding on top and quick and light on bass. Can take a dull or drab sounding system and give it some "pep" on a budget. Next up might be Nordost Flatline. Not really so much bright as it is lean in the mid-bass and detailed throughout the mids and top end. After that, and i know that this one varies BIG TIME from system to system, is Analysis Plus Oval Nine. I tried it in two different systems and it was VERY bright and splashy sounding to me with a very noticeable lack of output in the warmth region. Obviously, your results might vary, especially with the last suggestion ( AP ). Sean
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