Ultrasone - Pro750 (re-cabled by moon-audio, Silver Dragon); iCans.
Denon - D7000; D2000 (really Lawton LA2000; markl mod and balanced by Mark Lawton); D1001 (re-cabled with D2000 cable).
Headphone Amp Inventory:
BHSE by Kerry (for both O2's) -- now with Mullard xf2s (late break-up)
Senn HEV90 -- Orpheus (for HE90s)
Balanced Beta 22 by YBM (for HD800)
Dual balanced custom M^3 by YBM (for AD2K's, K701s, others)
EF-1 (my only single-ended amp other than the beyer headzone, so I use it for the Grado's and sometimes the D7000, but the D7000 actually sounds better out of my vinntage Carver receiver, and even the headphone jack of the Benchmark DAC)
QES HPBA-2 Custom Balanced for 600 ohm phones (beyer T1 and 880/600)
SRM-717 (for the rest of the Stax and the Baby Orpheus)
SRM-1 Mk-2 (for the Gammas)
RWA Isabellina (specially built for the K1000)
beyer Headzone (for 800/250)
Portable: iQube / RSA Shadow / Custom Mini^3 by YBM / Pico Power on order
Wadia SACD CDP
Silent PC running ASIO with MAudio 192 SPDIF, plus USB via SonicWeld Diverter.
Transcriptor TT w/ vintage Shure V15-IV
Denon modded univeral CDP (with Vanity Board)
B&O CDP and TT with MMC2
Sony CDP (several)
Oppo universal CDP
Sony PS3 with SACD playback and digital out