I really don't know why Foobar gained such popularity around the forums here. It's a good player: Very flexible, supports many output methods and plays most formats known to man. So what? There are a dozen others like it.
When i first entered into pc audio about 5 months ago, i compared every possible player I could find, including : Foobar, cPlay, Jriver, Media Player, Media Monkey and others.
ON MY SYSTEM (PC -> Isabellina -> Plinius 9200 -> Proac D25) I heard noticeable differences between players. Who won? Jriver, by far. Cplay came second, SQ-wise only.
Re Jriver, aside from its user interface which offered the Theater mode that I so desperately needed for far-away viewing, it also had superior sound quality to Foobar. This does NOT mean it will always sound better. It ONLY means it sounded better on MY setup.
Conclusions? Test for yourself. If you can't hear the differences, they all sound the same. It can be because your system lacks resolution, because your DAC does a better job than others in signal processes and is therefore less affected by jitter or other issues affecting playback. Hell, I'm sure that if I were to change the DAC on my system to a fancy hi-tec MSB for example, the whole rating table for players would be reshuffled.