Does your receiver have a digital input? If so, using the digital output of the disc player may well be the cheapest/best solution. Sound quality is almost entirely depedent on the quality of the DAC in either the disc player or the amplifier.
Second, do you also watch video (if only for concert recordings)? If so, connecting the stereo system to the tv is a great way to improve video sound on a budget.
Second, do you also watch video (if only for concert recordings)? If so, connecting the stereo system to the tv is a great way to improve video sound on a budget.