I think the difference between vynil ( old ) and current digital music is that the digital versions have been manipulated until the final music file has no relationship whatever to the original performance. Mostly "loud" and boomy because that is the "in" thing and permits cheaper reproductive technology.. Ultimately vinyl cannot maintain play-back quality. The original digital music file preserves the recording quality ad infinitum. To obtain true reproductive fidelity stay digital, use a good quality digital amp, and spend lots of money on speakers - and NOT the usual boom boxes. The reason you don't see real specifications of speaker systems is that they are usually abysmal. Also do not fall into the amplifier wattage trap - the real criteria are linearity and harmonic distortion.

Finally - attend a real live concert - especially classical - to get a feeling what original performances sound like.