I've been impressed by many, many inexpensive knives. There have been TONS of Kershaws, SAKs, Bucks etc, that fell into that category that were VERY good knives.
Recently it'd been Sanrenmu knives and it's siblings that have impressed me. Maybe not supersteel and exotic handles, but most of them are solid as a rock, and have a great fit and finish for even double the price.