Kinki Studio EX-M1 or EX-M1+. It has replaceable op amp sockets that allow you to switch out op amps and change the "voice" of the integrated. If it is too bright, you can start loading Burson V6 Vivid or Classic op amps to smooth out the sound.
ADD: The Vincent Audio equipment is very excellent and refined sounding, but it is very warm sounding. Great if that is what you want.
ADD: The Vincent Audio equipment is very excellent and refined sounding, but it is very warm sounding. Great if that is what you want.