DS4
- Supports Intel® Core™2 Extreme / Core™2 Duo processor
- Supports Dual channel DDR2 800 memory
- Features Dual PCI-E graphics interface
- Features SATA 3Gb/s with RAID function
- 8 Channels Intel High Definition Audio
- Optimized Gigabit LAN and IEEE 1394 connection
- Industry's leading all solid capacitor motherboard design
DS3
- Supports Intel® Core™ 2 Extreme / Core™ 2 Duo processor
- Supports Dual channel DDR2 800 memory
- Features PCI-E graphics interface
- Features SATA 3Gb/s interface with RAID function
- Intel High Definition 8 Channels Audio
- Optimized Gigabit LAN connection
- Industry's leading all solid capacitor motherboard design
so, DS4, IEEE 1294 (Firewire)
Better audio chipset (iirc)
Two PCI-E graphics cards (don't think SLI/Crossfire compat tho)
DS3
£20 less.
http://forums.overclockers.co.uk/showthread.php?t=17616385
go DS4 tbh, I think I will.