I use Quo Vadis Habana blank notebooks with (mostly) Lamy fountain pens and Sailor inks. They have Clairefontaine paper that just works wonderfully -- it both dries quickly and doesn't bleed through. If you haven't tried them, you're in for a treat; enjoy!

(I believe Quo Vadis to be a Canadian company that mostly makes planners and such, and their notebooks are getting harder to find. Even the good folks at Goulet Pens have given up trying to keep them in stock. When I come across some, I stock up.)