The Sony is okay, but need a decent 16 bit filterless dac for sure, I have heard them on several sony transports that are used in hi-end machines, Krell etc... Go for DAC-AH, audiomirror, I think someone called Scott nixon has something as well.. all relatively good pricing.. Now beyond that sure room acoustics are always a good investment, but its also very hit or miss for what you are trying to correct...
Nuforce Amps well so that I do not catch too much flak for this I will keep it brief, Dry & a little Raw in my opinion.. for the money I see the appeal, but you could possibly do better if you find the right amp to work with your speakers, nuforce may not be that amp for you, but might be for someone else's speakers if you know what I mean.