I've been using the NFX for a month now and they're absolutely superb.
Initially they were extremely bright and didn't sound too good and to be honest, I was a little disappointed.... but after about 3 weeks or so, there was a sudden change and the speakers really perked up.
And what a change it was! Everything simply opened up with SUPERB imaging and soundstaging. There was a very nice weight to the sound..... and in my room there was simply no need to add a subwoofer. Reminds me of a good Maggie panel but with way better bass.
I ran them with an old Zen SE84BW built in 1999 which I had picked up 2nd hand and they were simply marvelous. When I used them with my main system through my 2A3 monoblocks, they were even better.
Compared to my Polaris, they couldn't quite match up but ran the Loth-X speakers pretty damn close. And remember, the Polaris cost about 5 times as much!
I'm now using the NFX as a 2nd system in my bedroom.
For those of you who've been put off by the 50Hz bottom end, thinking there would not be enough bass, trust me, you'll be surprised by the weight of the sound. This is truly a remarkable speaker..... after a month of hard running in .....

For the price, I sincerely believe you'd be hard pressed to find a better full range speaker. Not without weaknesses (sensitive to placement) for sure but simply superb and most importantly fun.... I'd recommend anyone to get a pair.... You won't regret it.
I could not be happier.