Winamp is pretty good if you use ASIO to connect it to the Benchmark. With Windows 7 comes the WASAPI interface. This allows exclusive control of the audio device natively without kmixer latency issues. There are a few programs that do this but J River Media Center is my favorite. It has a WASAPI event style option that let's the DAC / sound card control the flow of data, will stream the files straight from memory (RAM is fast and this helps even more with jitter / latency issues), has great output / up sampling options, plays everything, and is incredibly customizable. Foobar is another good option. The last time I used Winamp it didn't offer WASAPI event style. ASIO can always be used but in my opinion doesn't allow as much fine tuning and ultimately falls short of J River and Foobar.