Instantly, after assembled the PC, I loaded Premiere Pro CS5.5 and perform the Mercury Playback Engine hack to test the performance. It was awesome to edit on a 30" display and preview at 1920x1080 1:1 on second monitor.
I picked this particular PC case as it comes with a built-in HDD dock with front USB 3.0 ports. It's important that USB ports are not aligned side by side or positioned very close together. Now I can plug in 4 SD card readers to copy DSLR footage to external HDD all at the same time.