If i was going to build this computer for myself: i'd replace the Zalman CPU fan with a passive fanless heatsync like Scythe Ninja or Thermalright SI-128I, and the Nzxt Lexa case with Antec P182 or the Antec P150 that already includes an ultra silent fans and a decent quality PSU. Reducing fan noise as much as possible is always important for any studio computer, doesn't matters if you're using mics or not.
That's the reason i'd replace the graphics card with any fanless card, even one with 128mb video memory would be more than enough to run a dual 19' display setup at 1280/1024 in 32bit mode. As long as i'm not running heavy games on my studio pc of course.
RAM, i'd go for lower Cas Latency, preferably CL4 or even lower if possible, from a known manufacturer like Corsair or Kingston etc...
Also, i'm not quite sure regarding the quality of the current Intel mobos, i'd go for an Asus equivalent instead... I could be wrong thou, but i see way too many faulty Intel mobos all the time.
DVD-RW, Plextor or Pioneer FTW!
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