My notebook of choice these days is a Clairefontaine wire notebook (8.25 x 11.75) which has colored pages, tabbed sections and graph paper. But my favorite feature of this confection of stationery delight is the easy flowing smoothness of my writing experience. I especially enjoy using the Uniball Jetstream, which has a generous flow of ink without smudging or bleeding.
review of the Uniball Jetstream if you're not familiar with it.
I found this notebook in St. Paul, MN at a gift shop and paper store called The Paper Patisserie. They have a small selection of pens and notebooks and note cards.
What's your experience with Clairefontaine?