The Torus RM 15 Plus or The Synergistic Powercell UEF 12 Power Conditioner/Transformer?

Good deal! 

I did a lot of research between the Torus and AudioQuest's Niagra. But I ultimately preferred the Torus's design and engineering philosophy a bit more.

I have nothing but respect for AQ and SR.  But as most guys you're always wondering.

I was looking at that same Torus model.
From what I've read; they're really good!
Synergistic makes nice stuff! I don't know much about the power cell.
In the end, I ended-up getting a great deal on a PS Audio P12, had to get it.