The lock out on the cane creek is not at all a lock out. From what I understand it closes or nearly closes the compression ports so the shock is just less active. I love it, it really helps when climbing over rooty bumpy stuff as you aren't bouncing around as much and can keep your cadence, but you are...
I can't speak to how it will work with the spider, but in my experience the coil IL is fantastic for small bump compliance. And you will climb better. Magic carpet ride.
This is very helpful. Thanks for the detailed review of the Coil IL. I have a Devinci Spartan, love the bike but could never get the RS Monarch feeling right, I'm a lighter rider at 150 ish, so I bought a used CC DBAIR CS to try and find that magic small bump compliance that I had with my 38...