My mate absolutely swears by Gom Player, and I must admit it doesn't look/sound bad at all. However, since I'm forever removing digital vermin from his machine, I'll let him be the guinea-pig for a little while longer before I go ahead and install anything quite so Korean on my machines.
I originally paid for WinAmp back when version 2 was still a gleam in Justin Frankel's eye. Then, when it changed ownership, I later coughed up again in order to get the unrestricted 'Pro' version. I've since bought further licences, including one for use on my daughter's laptop, and still like WA, despite all the useless garbage that can come with it.
Regarding visual media players, I don't think you can go far wrong with a combination of Media Player Classic, Real Alternative, QT Aternative and the K-Lite codec pack - provided you know what you're doing when configuring the umpteen various opportunities to completely hose any other player on your system.
For everything else, there's the very wonderful
dBpoweramp suite.