Can anyone explain why so many Mac players don't allow navigation by folder tree? I really liked the demo of Swinsian but I dropped a line to the developer asking if he had any plans to introduce folder navigation and got a rather pompous, curt reply that it wouldn't be happening. I mean, why not? What harm would it do? My music is all organised neatly in a proper folder structure and it's all for nothing. I use JRiver right now but although it sounds great it doesn't half look ugly.
There's surely a market for a Mac Foobar equivalent.
Why not just use the Finder? You can set it so that music files will open with your favourite music player when you double-click on them easily enough.