Basara:
You have a couple of options. My personal opinion is that the SB-Live's have a somewhat HIGH signal-to-noise ratio, despite what any specs might say. I've compared my AW744 Pro card's hiss levels to that of the SB Live! cards and it's sad that my little $30 card sounds better playing music and has a LOT less hiss and noise. It's true the AW744 has an optical out which is nice for going to my home theatre, and the SB Live! uses an old analog output (I don't count their proprietary SP/DIF as digital).
If you really want to upgrade you have a couple of options.
First, to make your winamp sound better without spending any money download the
MAD Winamp decoder. This is an actual upgraded mp3 decoder which works directly in winamp. Even the 16-bit decoding sounds far superior to the built-in one which comes with winamp. Their website will tell you how to install it. Also, with the MAD decoder you can set it to 24-bit and 32-bit decoding, which leads me to my next point.
There are a couple sound cards I know of immediately which offer exceptional quality playback, but are also excellent for recording music as well.
The
Delta Audiophile 2496 offers 24-bit 96kHz playback and recording as long as your PC is 266mhz or faster and has at least 128mb of pc100 ram. It has a dynamic range of 104 dB, frequency response from 22 hz - 22 kHz and THD (Total Harmonic Distortion) of .002% (inaudible to the human ear). You can pick this card up for $170 from the website I've linked to.
The other card, and probably my favorite on the market available today, is the
Yamaha DS2416 or DSP factory. This is possibly the best audio card on the market as far as recording goes. It also has some exceptional playback features. It is capable of playing up to a 32-bit audio stream, and is also compatible with windows to play standard games and things.
The above card is more oriented for recording but it's one of the absolute best there is. It will cost you about $400, so I ONLY recommend it if you EVER plan to do some recording/mixing as you can do it all with the Yamaha card. If you just want true audiophile sound, the Delta card should do.
dm