Hi joy division.
I'm an editor working for a large broadcaster here in the UK. And I have to say that despite using a myriad of systems over the years I have never heard of Casablanca. It is definitely not used at the BBC or any other broadcaster I know of.
I would say there are only two real options, and these are used day in day out at thousands of broadcasters and facilities houses around the world. And they are now ridiculously cheap. These are;
For the PC - Avid Xpress DV;
http://avid.co.uk/products/xpressdv/
About �700, and the dogs ********.
And for Mac - Final Cut Pro
http://www.apple.com/finalcutstudio/finalcutpr o/
Similar Price, they are even cutting Hollywood features on this now.
These two really are amazing packages, and outgun even similar systems that cost �40,000 just a few years ago.
Even though you are familiar with Casablanca, I would ditch it. It's not a true professional system, and even judging by the website, looks slightly shoddy.
Hope this helps. Good luck
H