They are great. The cheapest one is for around $115. They provide better sound and surround sound experience when listening with headphones. This is my favorite sound card. It is a Creative card, but it has on board firewire as well and is under $80.
im think about getting a new sound card. i looked around for a bit and found that Xi-Fi soundcards cost 5 or 6 times more for around the same specs. so im wondering what is so muck bettter about Xi-Fi cards. what is the best sound that i can get for around 70-140 bucks.