So basically I'll tell you what he built, and it'll probably be cheaper
I'm just going to copy paste
I took an octocore AMD, low power for the quieter cooling. I spent money on fast 16G of RAM, making up for 4 drives in RAID 0+1.
RAM means caching drive data, so I get blazing fast access, keeping the corse busy.
Then I put money in a quiet cooler and a Xonar DSX card for quality sound
Use a coolermaster case with a couple of wide diameter fans to keep it moving
You can get any sh*tty GPU, it'll work fine for audio production
However, scratch the Xonar DSX
If you have an internal sound card, unless the card supports ASIO, you'll need to download a driver called asio4all for better performance
ASIO4ALL IS A HUGE PIECE OF SHIT
So just get whatever somewhat decent but not fancy sound card you like
As for an external interface, I'm going to loop up my local music shoppes wares and pick something
For sure you'll need MIDI in/out ports
So kiss the Scarlett 2i2 goodbye, since it doesn't have any
for some retarded reason