I have owned or tested in my system almost all DACs mentioned here: Audio GD, Orchid, Lampizator Big7, Bricasti, Trubadour. Most of them are fine DACs, very resolving, precise, musical and overall pleasing. However my personal preference goes to Audio Note 4.1, EAR Yoshino DAC 4 and SW1X DAC 3 which can be found on S/H market in your budget. You will notice that almost all DACs mentioned here are R2R DACs with Philips TDA1541 chip. This is not a coincidence. Many audiophiles appreciate R2R DACs and that particular Philips chip.