I must have 10 - 15 utility knives, but I think I've found my favorite.
Picked one up at Home Depot today. (on sale for 2 for $8.00.)
Unlike standard one hand utility knives, this one has a button lock and swings open with a press of the button and a flick of the wrist.
Wire stripper knotch and a strap cutter knotch also.
A comfortable and solid knife to throw into a tool box or even a bug out bag.