I switched from a triple to an FSA mega-exo carbon compact 50/34 on my Tetra and it has worked out well. Have enough low gear to get up the hills, so I don't miss the triple. If you like to hammer in the big ring, a 50 may not be to your liking and you'll get some spinning on downhills but I don't mind coasting. As for Record or Chorus, if you want the status and seek to save a few grams, get the Record and pay for it. I have Record, Chorus and Centaur cranks on different bikes and can't tell any difference in the performance. The Centaur is by far the best deal.
I agree with Lon on getting last year's 2006 model and saving some money. You could use the money saved to get two cassettes to fit dirrerent riding terrain. The 2007 prices, especially on Record are crazy. The new Ultra Torque is just Campy's way of torquing more money out of your pocket.