My head hurts....

1) what do you have now, 2) what mediums do you prefer (SACD, DVD-A, Redbook), and 3) why are you thinking you need something different?

The last one is really the key point. If you are unhappy with what you have or are just plain bored, then a change might be in order. The medium of digital is like computers; something new is always around the corner - always. Think through what is important to you as a listener and what you want out of anything you would buy.

Knowing yourself is very important in this crazy world of hi-fi. If you are a buy and hold kind of person, don't read about the latest thing if you are happy with what you have, it will only make you miserable. If you are a gadget person who loves the latest and greatest, be prepared to swap out what you have every year or so and budget accordingly. If you are somewhere in between, wait out the latest fads to see what sticks, and buy solid, reputable brands. And if you aren't sure of something, buy used and be prepared to turn around and sell it right away if it isn't what you want. That last part is what makes Audiogon a godsend for many.

Definitely try computer audio. If you want cheap and quick - try Slim Devices SqueezeBox Duet. If you want higher fidelity, try the Slim Devices Transporter. If you want better convenience (and no need for computer) try Sonos. If you want some of everything, investigate Apple TV and a DAC of your choice. If you want best fidelity get a computer and an asynchronous USB DAC such as Wavelength or Red Wine Audio or the ModWright Transporter.

Yes, these all get progressively more expensive and yes more, different and "better" are always right around the corner. Which is why the Duet is a good, inexpensive place to start.