Chiming in here.
I ran a FMR RNP for about 6 months. Really, really, clean sound. From what I've heard of the T-mod UA5, I'd say the RNP is on par with that (maybe even a little more transparent). Great build quality. Excellent customer service. I powered mine with a 12V SLA (this was before the wallyworld battery was commonly used).
I was running it with Earthworks and the combo was a bit on the bright side. I've never heard it, but I'd have to guess that Nuemann or Schoeps> FMR RNP would sound very good.