I have the privilege of living in Oregon. Within a 15 minute drive of my office are the manufacturing warehouses/headquarters of:
• Kershaw (Zero Tolerance, Shun)
• Benchmade
• Gerber
• Leatherman
• CRKT (even though it's just their headquarters, not any manufacturing)
Before Benchmade bought Lone Wolf, that was very nearby also.
The knives that number the most in my collection are Kershaw, and I'm very careful to buy USA made models, though most of them are "factory seconds" bought at substantial discounts during their yearly factory sale. They all work and cut great, though! Plus, anytime I need my Kershaw sharpened, I just walk there on my lunch break and wait while they do it for free.
But Benchmade holds a special place in my heart. The most expensive knife I own is a Benchmade auto (thank you, Oregon for your superb knife laws for citizens). And my most commonly carried knife is a Mini Griptilian. I don't leave the house without it.
I would love to own a Spyderco Paramilitary II, but I just keep going back to the Oregon companies! Not only do I feel it's important to buy USA-made knives, but I have the particular dilemma of trying to stay local. VERY local.