Send music from computer to Receiver?

Yamaha Cavit series is a sound processor and will do what you want to do. It's not liquid as an upscale amp, but will improve the sound of the most stock soundcard.

It stands up vertically and doesn't take up much space - and looks sleek. Besides having digital outs (ptical and coauxial), it has effects like Europian concert hall, church, Jazz club, etc.

You can tweak it from a computer. It's fun, and looks sleek - not for the high end minded, but will improve the stock.

You can get them at ebay, amazon, and buy.com.

I use Yamaha cavit products. Improvement on stock soundcard for sure, but not as good as a highend soundcard like lynx.

Has non-fiatiguing sound - USB hook up to by pass sound card for better sound. Has pretty good headphone out. Looks slim and sleek by the computer.

Can hook up to a DAC by digital coax or optical, though it has one inside already - pretty good but can do better.

Another possibility is if you want to get a Philips mini system with USB input if you just want small sound - sounds pretty good for a mini (digital amp) - MC-M570.