For an inexpensive "post-production" tool, I have found the hand-held OLFA RTY-3/DX rotary cutter to be terrific. A hand-held rotary cutter much like those used to cut pizza, this one is equipped with a plastic pistol grip and is popular with quilters and leather-workers.
I use it to trim prints prior to mounting, over-hanging edges of mat windows, shipping labels, foam core, hinge tape, you name it.
This model has a 60mm cutting wheel, which I believe is better suited to the variety of tasks I use it for, as opposed to the models with 45mm blades where clearance becomes an issue, say with a sheet of foamcore. The well-conceived design features a squeeze handle and blade lock to expose and retract the circular razor blade. Replacement blades are pricey ($7) but you can buy a sharpener ($10) that will extend the life of
your blades.
You can pick one up at most fabric stores or leather stores, or order it
on-line. To get a gander, go to
http://www.store.yahoo.com/olfablades/9655.html*
I use it in conjunction with a Logan straight-edge directly on my work
surface, a desk-high counter covered with 4x8 sheet of SINTRA (a high-density foam used for sign manufacturing) cutting surface. After a cut, there is hardly and evidence, unlike my X-Acto knife which leaves deep cuts in the same surface.
I've looked into getting a self-healing work surface (many sewing suppliers make cutting surfaces), but have found the SINTRA to be satisfactory in every way, and much more economical at $30 per 4x8 sheet compared to $150.
It doesn't match up to a flat bed rotary cutter from the standpoint of multiple repeat cuts in the dark, but I find it much more versatile in all other ways. My flat bed rotary cutter spends most of its time leaning against the wall.
--Keith S. Walklet