If you want to have THE eminent sound, you can only do so by getting the real thing and wank it through a smallstone phaser. A Solina String Ensemble sounds slightly grainier, which makes it sound less smooth: the phase will be even more noticable (as much as in the low register of the eminent).
If you want to get close, the Élkorus will do very fine. There's also a few VST's that are said to get close, but I haven't been able to test these personally.
If you want to get your own Ensemble sound, combine any Synth saw waveform with any multiband chorus. Don't forget the phaser..
