I like Premium Matte and Pro Luster, depending on the subject.
But don't limit yourself to Canon paper. Order a sample pack of Red River paper and try theirs. RR has ICC profiles for the Pro-100 and I get excellent results with their papers.
Great suggestion from John Hoffman. Plus you can call Red River and ask what is there best paper for B&W with a Pro-100.
The Red River sample pack is an outstanding deal.
I prefer higher gloss paper for B&W. The Pro-100 can NOT print true B&W. It will always tint it some way. The reason is, it has to use all it's cartridges to print B&W.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
04/20/2023: New firmware version 1.4.1 is available for EOS R3
03/30/2023: New firmware updates are available.
2/07/2023: New product announcements!EOS R8 EOS R50RF-S55-210mm F5-7.1 IS STMRF24-50mm F4.5-6.3 IS STMRF15-30mm F4.5-6.3 IS STM