So I am the guy who put the system together from scratch. Feel free to email me at firstname.lastname@example.org, call me directly at 800-323-2325 ext. 120 or post a message on this forum if you have any questions on the setup or anything regarding this system.
Great article, I'm in the process of spec'ing out a new computer project myself (I've gone the DIY route since coming over to the PC world in the early '90's). One of my "must-haves" for this upgrade is audio/video editing capability, so thanks for all the good info.
Also concur with your inclusion of the Tom's Hardware link - I've found tons of good info on there over the years.