My younger son decided (on his own) to use my chef's knife last night to open a coconut, and what used to be a straight edge now is, well, serrated. I went to the local Williams Sonoma today to try a bunch of knives, and really liked the feel of the Shun Classic. They have two models of their classic chef's knife-- one hollow ground (with grooves) the other, flat. The folks at the store said that the only difference is that the grooves may help when chopping or slicing with the food not sticking to the knife, but otherwise performance should be comparable. Anyone have a view on whether to groove or not?