Hey Now,
I picked up a brand new OBH-11 off the FS for 65 bucks and did the DIY replacement of all 7 capacitors with Nichicon Muse and Elna Silmac, with a Brown Dog Adapter and dual AD797B opamps and the Elpac PS. I probably have all of 100 bucks in this unit. I really like how it sounds. I have 3 headphone outs in the bedroom and I keep plugging into this one with my MB Quartz 300 ohm QP805HS.
It sounds way above the 100 bucks I have in it. Nice punchy bass, extended highs, the gain is a bit higher now because of the AD797B opamps, but the volume pot is a quality one so there is no imbalance at lower levels. This was my first DIY project removing caps off a pcb and it wasn't that difficult. There are some good instructions on Head-Fi to do this mod. I didn't have a solder sucker, I do now, but I used solder wick braid and it worked just fine. It is a very good headphone amp when upgraded.
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Finest kind,
Chris