Good question, I opted for no new sound card on my lastest two computers. Haven't missed it at all except for the midi connection for my keyboard. Now I run a set of logitech usb headphones and have no complaints on the sound what so ever.
I'd say, save the money or spend it on something else
-C-
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Thermaltake Level 10GT
Intel i7 2600K @4,3Ghz
2 X ASUS Radeon 6950 (6970 BIOS)
8GB Corsair Vengeance DDR3 1600MHz
Corsair 120GB Force Series SSD
Seagate Barracuda XT 2TB
ASUS P8Z68-V PRO GEN3
Corsair H70 Hydro CPU Cooler