I'm back to post in this thread, since I have a similar issue. I use Grados for my main headphones, so I thought the WA6-SE will be perfect for my needs. When I emailed Woo today, they stated they actually recommend the WA2 for the best amp for Grados. I did say in my email that I was looking for a warm but not too warm sound that can help to deal with the worst that digital can do to my ears (really bright highs at times). So I'm curious, who else use the Grados on the WA2? I heard nothing but good things about the WA6-SE, so I was taken back on their recommendation on the WA2. I use the GH1 and GH2 for my headphones, and thinking about getting the GS2000e in the future.