You mean besides mine, right? Here are my picks for the top three systems:
Frank Cooter's DIY amp, Audio Alchemy/AN Dac1, HP-1 neilvg's fantasic electrostat setup, especially with HE90 Voltron's SDS-XLR with pretty much every dynamic headphone except AKG K340. They sound better on my system. That's good because that's what I have. Oh yeah, the Sony CD3000 doesn't sound great on it either. Every other dynamic headphone I've tried sounds better though.