Hi,
Im new here, but I have Grados HF2-F1 #278 with jumbos and tape mode, SDS Labs DIY amp and Im happy with SMSL 1955 DAC,
after two months it sounds much better than new one, compare to X-Fi is like compare X-Fi to on board card, for me just SMSL sounds great and i purschage it for In work audio, on street Im run grados 80 on dell axim+uamp107b, at home i play Dynaudios and K701..
Great value, great sound, i like this little thing