Excel 2007

[justme]

That's what I heard Greg, except the article I read had a span of time you could buy 2007 and receive 2010 for free. I just can't remember what the months were

 

[xld]

The new functions are handy,

... as long as you will never need to pass them to someone with Excel 2003 or earlier

conditional formatting is better (though the interface is awkward).

... if you like lots of silly cartoon-like icons, never change the CF range, and the idiotic (not awkward, just dumb) interface

and A lot of the rest is worse - I hate to say it but I'd have gone for 2010 instead.

The CUBE functions are great, but again, not backward compatible; I like the pivot interface much more; tables are BRILLIANT; and it does look pretty (until you get over it and realise that it was designed by someone who has no concept of presenting information visually)