jim - check your digital cable... if it is a coax cable, you should replace it with one that is 1.5 m in length... shorter spdif electrical digital cables may be prone to ’reflections’ of the digital waveform, which can lead to jittery sound (harsh and gritty) - if it an optical cable, get a real glass cable (length not key if it is less than 2-3 meters - https://www.uniqueproductsonline.com/gltodiopca.html or http://www.lifatec.com/toslink2.html - getting the cabling right is good hygiene and will help any transport / dac combo you may upgrade to
i don’t know much about the oppo’s as transports, maybe others here can comment... i suspect it is at least OK
as for dacs, i would suggest mhdt (any model) with a we 2c51 upgraded tube, ayre codex (optical or usb input only), metrum amethyst or neko audio d100-2 -- all are very natural sounding, with warm tonality, excellent bass, treble is smooth, not at all prominent or aggressive
i don’t know much about the oppo’s as transports, maybe others here can comment... i suspect it is at least OK
as for dacs, i would suggest mhdt (any model) with a we 2c51 upgraded tube, ayre codex (optical or usb input only), metrum amethyst or neko audio d100-2 -- all are very natural sounding, with warm tonality, excellent bass, treble is smooth, not at all prominent or aggressive