I've used Sitka, Eurpoean and Englemann for the most part, but also Western Red Cedar. Although an equivalent stifness bracing pattern of Red Cedar will be a little heavier than Spruce, it carries with it the advantage of the braces having a larger gluing area. There is some Red Cedar floating around that has an exceptional s/w ratio that approaches spruce, but it has to be carefully selected. In general spruce will have a better s/w ratio.
There are a number of makers who swear by using cedar on cedar. Friederich makes most of his fan braces out of cedar, for example.
CE Sobel Guitars