I would recommend trying Basiccolor Display - there is a free demo which is fully functional.
What does this offer that argyll doesn't?
Also, you could order a ColorMunki spectro (the triangular thingy) at B&H and see whether that works better; you can return it if you are unhappy.
I guess.... I don't like abusing store return policies like that though. ______________________________________ it has a certain smooth-brained appeal