I'm very impressed with Spyderco's production quality. I checked out a C95 Manix (see Doug's review in Shot Show 2005) and the C90 Stretch. Both are solid lockback knives. The Stretch (in plain blade) is a wonderfully thin knife with a long, robust blade, and grippy Kraton handle inserts. The only problem is that the Kraton insert on the clip side makes it hard to slide the clip over your pant's pocket.
I can't get over the superb quality and variety of modern American-made production knives.