WARNING:

fftopic:
The reason that 44.1 kHz was chosen as the CD standard sampling rate is that the highest frequencies the format can reproduce are half of the number (the Nyquist theorem). Hence, CDs are supposed to accurately reproduce up to just above 20kHz (specifically, to 22.05 kHz), which is the upper limit of the human hearing range. Now there is some thought that higher frequencies and harmonic content can influence the overall sound, even if they are not in the range that humans are able to hear (192kHz is great for dog music). The 16 bit/44.1 kHz spec was also arrived at based on the capacity of a compact disc. In other words, CDs or digital recorders running at 44.1 kHz were not meant to sound accurate or even good much above 20 kHz. The generally accepted theory is that the higher the kHz number, the more accurate the reproduction. Digital does produce a more clinically accurate reproduction of a source, but this is with the assumption that high quality components (A/D converters, preamps, word clock, etc.) are used. A $200 digital recorder is not going to be very accurate, nor sound nearly as "good" as a quality analog device. All things being equal (primo quality gear), digital is going to present a more accurate reproduction of a recorded source than analog. I actually prefer the analog sound.

fftopic: FINISHED
I still also prefer passive pickups. I think of pickups in some ways as an EQ, and I don't want it to be hyper-accurate. I want the magic EQ curve that good quality passive pickups introduce.