CuStom

I am trying to build a PC and want to know which motherboard I can use to cater the following:

Suitable OS.
Which intel dual core processor

Video card to support running 2 monitor at the same time. (21 “Color monitor”)
DVD/CDROM/CDRW/Dual layer DVD writer combo drive.
2 x Serial ATA hard disk drives connected in RAID 0 configuration.
Floopy disk drive.
Serial. parallel and at least 4 USB 2 ports.
2 x IEEE 1394 fire wire ports.
case and Power supply (500 watts) (inclule