foobar2000
If your current music player programs seem a little bloated and complicated, I highly suggest foobar2000 for having both simplicity and full customization. The program also includes ripping, trascoding and advanced tagging capabilities with album art display.
The foobar2000 audio player may look a little simple when you start it, and it keep mind that it is meant to be lightweight and fast, but once you start tweaking it, you can complicate it as much as you like with skins and optional components.