You're abusing the term "audiophile."
Being an audiophile is not the same thing as wanting to get good sound from your games. In my experience there is not a sound card that does music and games well. You get either one or the other because a soundcard is for games and a dedicated DAC and headphone amplifier is for personal "audiophile" music listening.
If you want to play games with THX sound and all that mumbo jumbo, get a soundcard. If you want to listen to music in high quality, high bit-depth and sample rate, get a dedicated headphone amp and DAC. If you're on a budget you will have to work very hard to find something better than a [ame="http://www.amazon.com/NuForce-Icon-uDAC-2-Black-Headphone/dp/B003Y5FRNS"]NuForce
Icon uDAC[/ame]. I haven't tried it myself, but the [ame="http://www.amazon.com/FiiO-E9-Desktop-Headphone-Amplifier/dp/B00470Q76K/ref=sr_1_4?s=electronics&ie=UTF8&qid=1295546288&sr=1-4"]FiiO
E9[/ame] is supposed to be really good as well.
If you're looking to spend a bit more money and get better audio (music) quality, I recommend a Maverick Audio TubeMagic D1 which I recently had myself. Another excellent system that I am using right now is the Audio-gd FUN, but that one can get quite expensive. I am waiting on an Audio-gd NFB-12 which is much more affordable and should provide similar, if not better sound quality for the price.
With a good DAC and headphone amp your headphones will certainly sound much better. But, there are definitely better options available for sound quality. Sennheiser HD555s are some of the best headphones for the money, I personally got some HD595s from Sennheiser when they were only $117 from Amazon and they're great for the price. The new versions are the 558 and 598 which I have not tried. My favorite headphones come from AKG (K701, K702) but they get quite expensive. Grado SR80i are great for $100 as well, but they are not circumaural so they fit on top of your ear instead of around it. I find that to be a bit annoying.Edited by Greg121986 - 1/20/11 at 10:07am