You can easily add Sonic Holography to any system with the relatively inexpensive, stand-alone C-9.
Member 4krow sells refreshed and modded units. Lots of threads about them in the proc mods forum.
You can also add the warmth of tubes by installing a tube buffer, between source and preamp, or in a tape loop.
For more info on tube buffers read Mobile Fidelity X-10D clone (Top Secret, Shhhh!)