if you go with a record crank, make sure your bottom bracket spindle is 102mm in length. I am assuming your bottom bracket is either campy or campy compatible. Chorus uses the same 102mm spindle length. I believe the others use a 111 or 115 depending on whether the crankset is double or triple chainrings. I don't think you have to worry to much about whether your crank is 8speed or 9speed compatible if you are running 9spd for everything else. If you were running 10sp then you might run into some issues if the crankset was designed for an 8speed drivetrain as the teeth may not mesh well with the narrower 10sp chain...but an 8/9 mix should not give you any grief.
-j