Chorus is certainly the best value in the Campy 11 line if money is an issue. Just how much better depends on how much more is being asked for the Record group. It can vary from $3-500. You can compare the differences here:

http://www.campagnolo.com/jsp/en/groupset/catid_4.jsp

The prices difference is about $470 here:

http://www.ribblecycles.co.uk/groups..._GS&type=RIBMO