The creative drivers don't work on more than 2gb.
That's absolutely wrong. The March driver update fixed the memory problem.
Creative Sound Blaster X-Fi 2.15.0006 drivers released on
March 14, 2008 fixed the 4 GB issue. These drivers applied to all X-Fi cards at the time except for the low low-end X-Fi XtremeAudio.
My system specs:
Vista Ultimate x64
8 GB Corsair DDR2 RAM
Main use for the soundcard? Gaming & HD Movies. You said the Xonar does not have HDMI abilities, but does that mean you can't run sound through that card into the receiver or anything else? I assume there is another way, which I don't think I would notice the quality difference.
You can output to speakers just fine without HDMI. The thing with audio over HDMI is the quality will be better. You can either output to a receiver and have it decode the audio or you can allow PowerDVD to do the decoding and send LPCM out to the receiver. The amount of bandwidth required by LPCM is too much for SPDIF or other output means.
That whole Creative drivers don't work on more then 2GB worries me. What exactly does that mean, does soundcards need more then that? lol
There were problems at one time when using 4 GB of memory or more. It's no longer an issue because of updated drivers. People that claim there is still a memory problem are wrong. I have 8 GB of RAM in this system and I've had an XtremeAudio, XtremeMusic, and X-Fi Titanium installed with no issues.
And do I care for ture EAX support, I don't think I do, but my habits and opinions change over the years. Really as long as gaming and movies sound good to someone who listen's to 128K MP3's and enjoys them, and that I can record sound with the card, and it will last longer then a year I think I will be happy. My system will eventually be running a Satiliite Card through it on a HDTV and on the monitor, will the sound card effect that?
The difference in sound with EAX is important if you game. Spacial sounds, for instance, where someone is walking up behind you, etc. True EAX and the supposedly emulated EAX from ASUS aren't the same. I'm not saying the ASUS emulation is total garbage but it's just not the real thing.
If you want to watch HD movies and play games then I think the XtremeGamer would be adequate and far cheaper than the Xonar. The Xonar, on the other hand, might simply be better in terms of the audio when it comes to watching the HD movies.
I don't have the best speaker system by any means. I've been putting off getting new speakers but the difference between soundcards can be amazing at times.
What you need to decide is just how important is the sound to you. The X-Fi will offer good sound for movies, music, and real EAX 5 support. The ASUS will offer good audio for movies and games but will be lacking in terms of EAX 5 support. Is that a major issue with you especially because you are paying considerably more money for the Xonar?
I'm not trying to push you in either direction. These are just things to think about before making the final decision.