Earlier this year I contacted John Purcell Papers (London), requesting offcuts and example sheets that they thought would be appropriate for use with printing and book making. They were extremely helpful and sent me a pack of 9 different sheets. Each was tested with a woodcut, brushpen and watercolours. 

Zerkall Smooth 145gsm - Overall best, printed nicely, appropriate feel and weight

Somerset Book White 115gsm - Too much texture

Fabriano 5 160gsm Smooth - Nice weight and feel, perhaps use reverse side

Magnani Pescia Book 120gsm - Too white

Somerset Book Offwhite - …..

Zerkall ENE Special Special Making 150gsm - Nice weight, too smooth

Zerkall Smooth - Too floppy

Japon 130gsm - Too smooth

Opaque  by  andbamnan