If you’re using Mac OS X and seeking a full time audio player, look no further than Enqueue. I’ve been using it since October 2011, and it just recently left beta and landed in the App Store for $9.99. The price may seem to be a bit on the steep side, but it’s a welcome price after the frustrations of dealing with iTunes and even other free players like Clementine and Songbird.
Where it stands out is its support for multiple audio file formats, including FLAC, OGG, ALAC, and of course your typical MP3, WAV, and AAC. It’s very lightweight and fast, especially contrasted with the aforementioned alternatives. It imports iTunes playlists and supports its own playlists you can create on the fly, has built-in Last.fm scrobbling, automatically monitors folders and adds files to the library, and has a multitude of keyboard shortcuts and customizations you can make to it. If you’re unsure and need some convincing, you can search around and probably still find the final beta of the app for download that expires after 30 days. (Enqueue: Website | App Store)