http://www.tomshardware.com/2005/09/01/the_value_connection_of_6_intel_945p_motherboards/page2.html

Processor: Pentium D 940 (3.2 GHZ)    -  decided

++ Chipsets:   
1.   P965  -  No PATA!! Where to connect DVD?!
2.   945P  -   Best option
3.   945PL  -  Max 2GB compared to max 4GB of 945P
http://indigo.intel.com/compare_cpu/showchart.aspx?mmID=22754,8764,142&familyID=10&culture=en-US

++ Motherboards:
MSI
1.  MSI 945P Platinum : RTL8882 Gigabit Lan, Via 6410 IDE Raid, Via VT6307 Firewire, Azalia 1.0 Audio,  - $638
2.  MSI 945P Neo2 F - No firewire, No IDE Raid, RTL8110S Gigabit Lan,         - $567
3.  MSI 945P Neo F -   Same as Neo2 F except Intel® 82573 PCI-E Gb LAN  -

Gigabyte
http://www.gigabyte.com.tw/Products/Motherboard/Products_ComparisonSheet.aspx?ProductID=1905,1906

1.  GA 8I94P Pro : GigaRAID ITE8212 IDE RAID controller, Broadcom 5789, TI Firewire, Realtek ALC882 audio codec. ICH7R
      - $602
2.  GA 8I94P-G  : As above except ICH7  (so no intel sata RAID), no firewire   $549

Asus

1. P5B -  965 chipset (core 2 duo ready), external sata, 
2. P5B-deluxe -  as P5B plus firewire, 'fanless' design, array mic, more sata channels, etc
3. P5LD2 & P5LD2 - Deluxe. Confusing details online. Some saw ICH7, some ICH7R :(  Otherwise look like fairly typical boards.   $562 & $638

++ Cards
7600 GS  standard speeds are - 400MHz - core and memory. Cards will likely come pre-overclocked.

1.  Asus EN7600GS (Silent) 256MB DDR2  DVI + VGA out,  550MHz/475MHz - $215
2.  Leadtek Winfast PX7600GS TDH GPU/Memory 400/800MHz  + dual dvi out -  $203
3.  MSI NX7600GS  256MB DDR2  - $213

MSI lists NX7600GS -T2D256EH & -T2D256E models, the former is probably without fan.

4.  XFX GeForce 7600GS 256MB DDR2 DUAL DVI TV Xtreme Edition -  GPU/Memory : 500/450
5.  XFX GeForce 7600GS 256MB DDR2 DUAL DVI TV     -   GPU/Memory : 400/400   
6.  Gigabyte GF7600GS Silent   $218

Both XFX cards are passively cooled.