Woah woah woah....amaroK is going to Windows? Huh.
Sadly, Siddhartha, not all of us have that option. Even if I did, I wouldn't have a decent enough set of speakers or decent enough sound system to notice any difference.
Concerning Linux audio players, I've tested all of the major ones for the GNOME environment and found that, like you guys said, Rhythmbox is my favorite. Exaile just wasn't doing it for me (the layout was not what I wanted). Audacious was cool for a bit, but I wanted something to go through and manually choose songs with, something I found hard to do with Audacious. Banshee WOULD have been fine, except it took too **** long to load up all my songs (~11,000). Rhythmbox beat it in that area, and thus won the grand prize.
I did NOT try Songbird, although I plan on it when I get home from my current trip.
As for Windows based players, I plan on experimenting a little bit. I've got Songbird, Winamp, foobar, and iTunes all currently installed. Any other suggestions?