Interesting and useful discussion. On both the soundcard and educational/political issues.
The only exception is the juvenile gay-bashing and groundless accusation that OP is gay. Based on what? What does assumed "gayness" have to do with anything germane to the technical discussion? And, when you get down to cases, GW's posts on the issue of "manliness" and "gayness" raise serious questions about his issues. More to the point, resorting to this kind of ad-hominim (look it up) attack shows that the perpetrator has run out of any legitimate arguments or relevent points. It's sad that so much time was wasted on an irrelevancy.
WRT standalone sound cards vs on-board sound chips, an issue that has not been raised is the fact that, with very few exceptions, the on-board sound has about half the amplification capability of a stand-alone sound card. This may be less of an issue withthe fancier speaker systems, but it does make a big difference with the less expensive speakers.
As for the issue of overclocking vs getting a card, it is useful to keep the following in mind: overclocking = VOIDED WARRANTY. Also, the larger coolers required are significantly heavier than "stock" coolers, leading to physical strain on the motherboard. Which can lead to premature failure.
Water/liquid coolers remain a risky proposition: water and electricity are a poor mix. The tubing used in such systems does fail over time, and close attention to the condition of the tubing must be paid. Another aspect of such systems that is NEVER mentioned is condensation when relative humidity is high. Lots of water dripping off the tubes and other components. In my line of work, I use liquid cooliong systems, and on even reletively cool days when it is about to rain, the amount of condensation on the tubing is amazing. Enough to form small puddles on the benchtop under the tubes. If you don't think the same thing doesn't happen inside your case, you're dreaming. In Technicolor. Especially in places where high humidity is normal.
The cost difference between even a top-end sound card and fancy after-market coolers (especialy liquid systems) tends to favour the sound card. If you can get between 5% and 15% improvement in performance from a $70 (oem version) to $200 (full retail version) investment as opposed to lots more for OC requiring expensive coolers and warranty issues, why not add the sound card first? Who knows, this might be enough to make the diiference tou need.
On the issue of sound quality, I'll bet the majority of posters here who can't tell the difference between the two choices are under the age of 30. MP3s and mainly computers / MP3 players (or MP3 players with dubious quality "ear/head phones") being used for listening to music. Note that MP3 is a LOSSY compressoin algorithm. I'm considedrably older than 30 and for the bulk of my life audio reproduction has gone in one direction - increased quality. This means two things. First that my ears are trained to differentiate between good and poor quality sound. Second, that I am unwilling to accept poor quality sound. MP3s are useful things, but trust me, it is not that hard to tell the difference between an MP3 file and a true CD recording. And the MP3 loses EVERY time, especially for music I know.
Those who don't know any better due to inexperience should excercise restraint in their comments re sound quality between on-board and stand-alone sound systems. Especially if you haven't listened to your music on a good sound system with real speakers. You would be astonished at the difference a pair of speakers can make on the same system. Based on my experience, the Creative speakers are amazingly good, especially when one takes the price into account. The Creative speakers that were designed by (and manufactured to the specs of) Henry Kloss are gems of the first order. He designed and manufactured some of the finest audiophile speaker systems ever made. Look up Advent speakers for one example. Tests done by THG confirm that Creative manufactures speaker systems that rival many "audiophile" speaker systems selling for thousands a pair. And trash many of the Logitech systems mewntioned here.