I have the Endura 4. It is a nice knife but with a blade of ~4" it's a bit too large for me to EDC. It does sit nicely in the pocket with its narrow frame though. And with its strong tip, VG-10 steel and blade size I have relegated it to my weekend EDC, hard use or house/yard work carry. The Delica would be a good EDC choice with its smaller size but for me I prefer the full-flat grind the Endura G-10 offers or for that matter, the Spyderco Tenacious. With a price of $30-35, the Tenacious offers a lot of value with features of knives costing 2-3 times as much. Features like full-flat grind, G-10 scales, phosphor bronze pivot washers, smooth/fast opening, great ergos, open construction and excellent fit & finish. The Native ($50-60) is another good knife with upper-end steel (S30V). The only knock on the Native is its pinned construction. That said, my Native 4 works well in my EDC rotation.
Some other non-Spyderco recommendations would be the Buck Vantage Pro in S30V+G-10 ($45-50), Kershaw Skyline ($35) and Kershaw OD-1 ($40). All 3 are US made and the Kershaws can be picked up at Walmart.