Klaus, Ubuntu, available as Kubuntu (CD) + added programs (hence not the easiest way but good) or a download of Ubuntu Studio (DVD)"Alternate" 9.10 (alternate means it has Raid, etc built in), makes many types of computer hardware purr. Forget OpenSuse, it`s as problematic and as hard to use as a nasty version of MS Windows and comes specialized towards Business internetting and serving as the style it comes "out of the box", not what you want to do. It is not simple to add, subtact, or change, added on programs in Ubuntu, it has come of age but isn`t easy there. To make the advice down to size, you`re looking at 3 Operating systems that should probably work easy but added programs are a bigger question. A Mac OS with it`s Unix (Unix- isoLinux?) build and who knows what best software Adobe CS4?, Final Cut? seems the easiest way to go. Ubuntu Studio probably needs no add ons to do what you need, just make sure the motherboard`s choice of slots and bios settings opens up the detection and performance you need. Windows and again, who knows what software, Adobe CS4?, Virtual Dub?, Sony? should be possible too. You haven`t mentioned which BlackMagic DeckLink model you`re aiming for or what your production format is but the above should reduce your number of next questions.