I have the HF-1's and I greatly enjoyed the new DT-880's at the meet. They were a breath of fresh air and yet not a let down from the HF-1's in many respects at the same time. They far exceeded the HF-1's with my organ and orchestral music and fell short with rock. Still, if I had the money, I would keep a pair of those around to listen to organ music on. The DT-990's were way too bright to my ears both times that I tried them, and the DT-770's were far too boomy to my ears on the contrary (although they are known for that). The DT-880's sounded in between those two, "right" to my ears.
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Team GRADO
Team College-Fi (Virginia Tech)