Here is the recent Machine I built.  We have 3 of these in our shop. The only Differnce is on One Machine Our Server I run a RAID 5+0 This is 5 Hard drives Running Striping for speed and Mirror for security and one parity Drive. That way 3 of us can access all the file without a slow down.
We order through MWAVE.. Have tried Tiger but they always seemed to be out of what I wanted and would back order etc.. Too much of a pain
Mwave always has what I want and gets it shipped out usally the same day Great Customer service Even on Faulty parts. They have sent stuff out to me when it was faulty even before I could return ship the bad part.
http://www.mwave.com
MB-BA21419 -BA30116 -BA20346-BA20346 -TEST   1 
 INTEL PENTIUM D Dual Core 820 2.8 GHZ EM64T 800MHZ RETAIL BOXED BUNDLE
W/ INTEL BOXD945GTPLR
 CRUCIAL 2GB DDR2 533 (512MB x 4)
ASSEMBLE/TEST BUNDLE        $341.90   $341.90        
 
 AA48770 -  1   SEAGATE 320GB ST3320620AS SATA2 7200RPM 16MB (Bare drive)NO DATA CABLE NO POWER CORD    $96.90   $96.90        
 
 AA51990 -   2   SONY AW-Q170A-B2 BLACK 18X SUPER ALL-WRITE DVDRW DRIVE (Bare drive) NO ADD-ON MEDIA     $31.90   $63.80     
 
 BA30107 -   1   ANTEC SONATA II (BLACK) MID TOWER W/SMARTPOWER 2.0 450W ATX POWER SUPPLY NO EXTRA FAN     $96.60   $96.60     
 
 1 AA32400 -   1   MITSUMI FA-404 1.44 FLOPPY + 7 IN 1 CARD READER (Black-bare drive) NO FDD CABLE    $19.90   $19.90     
     
 Thank you for choosing  Sub-Total $619.10 
Shipping & Handling Fee $24.11 
Order Total 643.21