Get an Auzentech card instead. It's the same hardware but with drivers that aren't complete ass.
I have a X-Fi XtremeGamer Pro and have never had driver issues in XP, Vista or Win 7. Yes, Creative could do to upfate their drivers more frequently, but they're usually well made and efficient, and the Vista drivers work perfectly in Win 7.
Still, the Phenom 2 CPUs are massively cheaper.
That's why I went with a Phenom II x4 920 @ 2.8 instead of an i7 920... well under half the price and the perfomance has been excellent. Would have gone with a 940, 955 or 965, but at the time of upgrading they were as rare as hens teeth and I wasn't willing to pay an extra $170 - $320 AUD again... not when I can get similar speeds with a little overclocking and an after-market cooler for $50.00.
In fact, that's happening on Tuesday. I've not overclocked before, so a techie mate, who's a wiz with anything and everything PC, is bringing up a Zalman cooler and is going to show me how to do it properly... not to mention, safely. I could probably do it myself using the AMD overclocking app, but Darren reckons it's better and safer done directly in the BIOS, which I'm not overly familiar with and (having to match up speeds, voltages and memory, etc), is a bit above my level of expertise at this time.
I've read cases where the 920 has been clocked to 4.6 and above, but we're only planning to go to 3.3 - 3.4 from 2.8ghz. That should give me equivelant to a 955 - 965 or better... and given they're the same architecture there should be no problems... and video creation/editing/conversion should then be even more of a breeze.