Re: 24bit 192kHz ??
I'm gonna give you my answer as an EE and the reasons why you should get definitively better sound quality. A hands on experience answer all I can say is what Steve and Satch said, the higher the better. Satch specifically when doing Super Collosal.I know I read it somewhere.
The Bit rate is the amount of bits the DSP(Digital Signal Processor) uses to store each of the digital "dots" in the Digital representation of your analog(real world) signal. So 24 bit is definitively better than 16 as you have more granularity to represent the vertical changes(amplitude) in the signal.
The Sampling rate first must fullfill the Law of Niquist, where the sampling rate of your DSP must be AT LEAST double the maximum frequency on your analog signal(44100 already does that), to avoid aliasing, which is known as a form of signal loss. Now going from 44100 to 192000 means you are taking almost 5 times more samples of the analog signal per second than you did before which basically allows the sampler to capture more nuances on your music, or as we EE call them, Transitory signals.
In the end you are ramping the resolution of your signal. First Vertically: with the bit depth, in Amplitude coarcessnes. Second horizontally, in Sampling rate, meaning you have more resolution in time.
In conclussion, the higher the numbers the closer it'll get to the real deal when you're playing it back.