I own M-Audio Audiophile 2496 (it costs around 200 euro) and it is really great soundcard. As I remember using latest ASIO you can achieve 8ms latency which is enough when you are playing live on virtual instruments. Previously I had Soundblaster Live! with a low noise level and instead of original drivers I was using alternative ones which allowed me to get 10ms latency.

Here is the link to Audiophile card:
http://www.m-audio.com/products/m-audio/audiophile.php