The best 3D image I have heard came from the little Zen SET that I played around with a few weeks ago. I have been reading about SET's in general and this seems to be their general style. It far surpassed any push pull tube amps that I have used in the past. I listened to it in a small 12' x 14' room that seemed to be crammed with musicians. Sorry that this doesn't help your situation, but maybe you are hoping for something that will not happen to the extent that you wish it to.
3-D Imaging: How??
I'm finally satisfied with my current system, except for one thing: it is absolutely 2 dimensional except with a few discs in which you get a little depth. I have: Rega Planet, CJ PV11L, McCormack DNA.5, B&W Nautilus 805s. Interconnects are TARA Labs Master Gen 2, speaker cable is Audioquest SA-40 (hyper pure silver) on top, CV-4 on bottom(the CV-4 actually compares well to other cables I have tried) All equipment sits on marble slabs that are "tip-toed" to the concrete below my carpet. I'm using an Isobar Surge protector on the CD and Preamp, with a Sonic Horizons Daybreak power cord directly into the wall on the amp. The room is about 12" by 13", but I have a totally dedicated room with a good nearfield setup. Why is my sound 2-D?? Thanks guys!!