I am about to build a new DAC, but I am undecided whether to use Delta Sigma technology or R2R - NOS. I've heard conflicting opinions and can't decide which option to choose. I have listened to an R2R DAC and the reproduced sound seems much more natural to me than an anonymous Delta Sigma. Is it just my impression or is there really a better sound using a DAC with this old technology? Thanks to whoever will help me in choosing.