Thinking of getting out of onboard sound (realtek) and was looking at creative since I only knew sound blaster for sound cards.  Is the X-Fi Xtreme Gamer sound card (not the pro or titanium) worth it?  I'm running Vista 32 bit.  Have a Conroe E6550 core2duo, 2.3 ghz, 1333 fsb; 2gb ram, vid card is nvidia 8300gs (next on the upgrade trail along with a power supply).  Any other cards I ought to consider?  Budget of under $100.