I've just been through this process myself for a new workstation, built on current consumer components. It dosn't fit the author's exact spec as it is built on the new x79 motherboard, with the new 2011 processor, but that could be replaced easily with the generation prior MB.
With regards performance,
Once the basics processor and memory is taken care of, the single biggest impact on system performance is DISK. This is even more important for video editing that photo's, but it can be just as important when browsing through that large image library.
My System has been speced with the expectation of editing eithe 80mp files off MF backs, or working though 1000's of files from a wildlife shoot. I was after the best performance I could get from consumer grade components.
Note, this is yet to be built, so I don't have performance specs. come next month.
PC:
ASUS PX79 WS LGA 2011 Motherboard. (Workstation board)
G.SKIL 64gb DDR3 1600 memory in 8x 8gb modules.
Intel core i7-3960X 6 Core Processor
2 x NVidia Quadro 4000 graphics cards
Thermaltake Toughpower 1050W 80+Gold PSU
Thermaltake Chaser MK-1 Case (Though looking at other cases still)
LG 12x DVD/BlueRay Burner
1 x Samsung 512gb SATA III SSD. (Double checking these compared to others for speed, may go OCZ yet) - OS Drive.
2 x 250gb SSD (existing) 1x PageFile, 1 x Scratch disk
Price: Approx US$5k from NewEgg for the new parts. (everything except the 2x 250gb SSD's)
Note: I am deliberatly avoiding INTERNAL raid storage for the image library.
Storage
1 x Burly Systems 8 bay SATA Enclosure with 8x1 TB Hitachi Drives. Configured in Raid 0
1 x 2 Channel SAS Card
This produces 800/MB/S sustained transfer rate for data and costs less than a bunch of SSD's. (Approx $2.5) and is well proven.
Main Image Library and Lightroom Library / Previews live here.
Online Backup
DROBO-PRO 8 Bay populated with 6TB of storage. (This is existing device, and will be the backup array)
I am still working out the best configuration of the SSD"s inside the PC, and that will require some testing between OS, Page, Scratch and other working. I may throw in another SSD for working drive yet, and reduce OS drive size. The bulk storage however, lives ont he external SAS array, and provides very high speed streaming for video editing.
Burly systems devices were in fact mentioned recently here in the Camera-Print-Screen tute when going around Jeff Schewe's lab. The guys there have been extremley helpfull in specing this for me. I havn't tested it myseflf as yet, but will be end of Jan.
Having just gone through the process of carefully selecting components for a similar system, perhaps it is of some use to someone.
regards
Mark