Hi, I am thinking of buying new amp/DAC to replace my current Fiio E7 and NFB-5.2 is on the candidates list. Other amps I am considering are M-Stage (or Asgard, but I at the moment I am leaning towards M-Stage) + probably HRT MSII (or maybe even E7 with line out dock, until I get something better). I am listening mainly to old school metal (Slayer, Death), but also industrial (Nine Inch Nails, etc) and a bit of other genres. From the descriptions M-Stage can provide the SS I am looking for: punchy but controlled bass, slightly on the warm side, fast and aggressive. However I cannot find too much descriptions of sound provided by NFB-5.2 and NFB-5.2 seems to be cheaper alternative than M-Stage with additional DAC (at least in Europe). For now I want to use my current headphones - Ultrasone HFI-780 with it, but in future I will probably check out other ones just to compare different SS. I also don't plan on upgrading DAC/Amp for quite some time after buying it. My main concerns regarding NFB-5.2 are: Will it suit my music preferences? Won't it be too slow/muddy for thrash metal? I would appreciate any advice.