Tiggerinva,

I haven't used either, but I do have an opinion

You could go to your local ACE hardware or HomeDepot or similar and pick up a 4' melamine shelf (hand pick it for straightness). Same size as the Great Planes pro-board, and about 1/3 the price.

If you really need a pinable surface, add a layer of Cellotex (sp) acoustical board, or laminate some cork board to it and you're ready to go.

If you use weights, clamps and springloaded wood clothes-pins (they're not really pins) and are carefull, you don't even need a "pinnable" surface and you could skip the cellotex/cork/etc. (I build on hollow-core without pins)

-E