Ok, all ordered, now awaiting delivery...
There might be some interest in where I opted for 3rd party options on some components to save $ like the new FB-DIMM RAM which is exxy for the Xeon powered workstations. A lot of my research was centred these discussions:
http://www.barefeats.com/
http://forums.macrumors.com/forumdisplay.php?f=1
http://discussions.apple.com/categor...categoryID=194
System as ordered from Apple:
Mac Pro 2 x 2.66 GHz Dual-Core Intel Xeon (Quad core)
1GB 667 DDR FB-=DIMM ECC 2x512MB ram (standard)
ATI Radeon X1900 XT 512MB SDRAM vcard (upgrade)
Airport Extreme (upgrade)
160GB Sata 3GB/s 7200rpm HD (downgrade)
1 x Superdrive
To the above I am adding:
2GB kit (1GBx2) - Total 3GB
Matched Pair:Fully Buffered:PC2-5300:ECC

DR2-667:240pin DIMM w/MaxSinks: USD$399.00 (AUD551 incl. delivery)
http://tinyurl.com/pr4pu
2x WD3200KS 320GB 16MB SATAII 300mb/s 7200rpm HD
AU$125 ea, $266.50 incl delivery (downgrade at Apple gave me $95 to put towards these for either RAID0 or separate source/destination video and scratch disks)
I note there's a great deal on the latest Seagate 500GB for $289 incl GST, delivery & 5yr warranty over at:
http://bulkbuy.com.au/site/
Pioneer DVD-RW DVR-111D $58 (second optical bay for reading discs while burning, not sure if I can burn two discs at once using Toast?)
TwinHanDTV Alpha USB2 HDTV tuner, reportedly works with my existing software EyeTV 2.3, used for PVR function. $94 incl delivery
http://www.citysoftware.com.au/
I will be using my existing Dell 2405 24"LCD for display, perhaps a 17" CRT as 2nd monitor.