I'm using a Canon Pro 100 and finding that the Luster 69# LU-101 to be the best so far.
I'm not sure if I'll stick with it though as I find it to be too good of paper for the task.
It's basically photograph paper so it's kind of glossy and very thick.
On the lookout for more stuff...I work down the hall from our company's print ops so I have access to hundreds of kinds of paper so I'll keep track of this thread and report back my findings if anyone cares.