The only thing i am not completely comfortable with is the quality section. Maybe just the bit about "...making MusicBee a favourite among audiophiles."
and the quality guide section (but I guess it depends on what you had in mind for that).
Also for "The ULTIMATE...", i am not sure about that. To me that comes accross as overselling, but perhaps others might comment on that.
'Ultimate' sounds very enthusiastic to my ears, but I think it is appropriate.
Just as ultimate holiday, ultimate atmosphere, ultimate experience, etc.
Saying something like 'the best' would be very self-boasting, but this says that if you need a player/organizer, this is the ultimate one to get.
If you really don't like it, maybe change it to 'essential' or something like that?
About the 'Quality Matters' section:
The part of making an assumption on audiophiles choices could be a little bit questionable.
Maybe change it something along these lines:
Sound quality matters
Wheter you play your music on an audiophile setup or on a laptop, MusicBee is designed with the features to fulfill all those needs.