If you are just sending PCM from a computer from lossless or uncompressed files, it shouldn't matter what computer or software you use. There's nothing complicated or non-deterministic about reading a file, decompressing if needed, and sending it to an output device. The only thing you have to do is configure the software so it does not modify the original "bits" of the encoded song.
The biggest bang for the buck in "upgrading" sound is speakers and room setup/treatments.
The biggest bang for the buck in "upgrading" sound is speakers and room setup/treatments.