Since IgorPro 7.01 more Color Table options ship with Igor, including some that are perceptually uniform.
I recently found these excellent colour maps from Peter Kovesi: http://peterkovesi.com/projects/colourmaps/
They are released under CC-BY and around 50 tables are available as CSV. I wrote something quick to bring them into Igor and have attached them here in case anyone else wants to use them. There is a PDF showing the colour tables as displayed in Igor, plus a zip file containing ibw files of the colortables. I had to truncate the names slightly to make them Igor friendly, but you should be able to work them out from the PDF.