If you already have a Native, you might want to go with one of the larger knives for variety, and fill in with the Caly 3 down the road a bit.
I have all 3 and carry all 3 from time to time, but the Caly 3 is my EDC. It always goes, even if I'm carrying the Para or the 83mm.
The Caly 3 is comfortable, light, and stronger than I imagined it to be. It gets used for all kinds of EDC chores. I would rate it solidly in the medium duty EDC range. Anything I used to do with my old Buck 112 I would do with the Caly 3. I use mine in the warehouse where I work cutting cardboard, thick zip ties, and electrical insulation... I use it around the house on heavy dog food bags, cardboard, trimming bushes, cutting string... I use it outdoors shaving fuzz sticks for fires, cutting rope & twine, handling general campsite chores that the 83mm doesn't need to do... Never had a problem with it at all. Some folks on the forums have stated that they used the Caly 3 as their hiking knife on weeks-long backpacking trips.
My 83mm is the one I usually carry with the Caly 3 when we go camping or hiking. I really like back locks the way Spyderco does them. They seem to be very robust for the size of the knife. I've never had a problem with any Spyderco back lock (or any of their locks).
My Para is the knife that my wife carries in the woods. I got it for me because of the light weight and open construction, but she likes to carry it because of its light weight. The comp lock on the Para has been excellent for the 6 months that I've had the knife. Mine has a centered blade, no blade play, and a solid lockup.
