The only value in the Orange box is Portal.
Portal on the other hand was new, interesting, and most of all fun. If there was an award for "best end-game credits" Portal would win hands down; if only Portal lasted longer than a few hours.
I know there are a lot of HL fans out there, clearly gamespot is one of them, but my personal opinion is that your money would be better spent on Jericho, or Hellgate London (the beta - not the demo - was awesome).