The Apogee Mini-Dac has a volume control and can be plugged straight into one's amplifiers. That's how I use it in one of my systems. The Apogee, with its USB capability, offers ultimate flexibility as well as wonderful sound. The Apogee also has an excellent clock which eliminates jitter.
Loading CD's into a hard drive uncompressed takes a little bit of time, but the
convenience of having one's entire CD collection available at the click of a mouse, the ability to scroll through Cd's and titles on a screen, and having music available to wife and family with such convenience, eliminating the handling of your discs and cases, more than makes up for the little bit of trouble it takes to load CD's on the hard drive.
I have found that this type of system is extremely wife-friendly. People love it. If you have a party, you can let guests scroll through, create playlists for background music -- and you don't have your CD's and cases out.
My only thing was that I don't like sonic compromise, even with a casual system. So, I experimented with several different types of solutions. Along the way, I tried the Apogee Mini-Dac. Home run. Everything I want in a casual system, convenience without sonic compromise.