Light Comparison:
EagleTac P10C
I didn't like the ergonomics.
Not smooth to slide in pocket.
Clip is a double-clip and bulky.
Didn't like clicky edges.
NiteCore EX10
Great ergonomics and feel (love the piston).
Great clip.
Great runtime and beam.
Great size.
Disappointing UI.
I wanted a light UI that is: Low, Med, High. I wanted to switch between these modes. However, you lose the user defined settings when you switch modes. So I got rid of the light. To me, it's really a dual mode (low/high) light, with the option to temporarily adjust brightness. However, the option for momentary and constant is a nice feature.
To make this light better, the user defined setting should be saved between switching low/high.
Light is almost ideal, and competes with LiteFlux LFX3.
Fenix P2D/LD01
I'm considering the Fenix line. Perhaps the LD01 for it's size. I think 80 lumens is the best balance between brightness and runtime. Maximizing runtime is not extremely important to me since I have access to a charger and spares.
Other Considerations
User interface (UI) will most important to narrow down your choices. This is one of the major deciding factors. Some lights are very annoying to use, some are addictive.
I'm also considering a light for one handed use. I want to turn the light on/off with one hand, and easily adjust brightness levels. Why? I want to access my light when one hand is in use (like when I'm carrying something, or holding onto something). Clickies are ideal for this, however, clickies add size and bulk. Twisties, NiteCore Piston, and LFX3 electronic switch are solutions.
EDC
EDC needs to be better defined. I really wonder if people mean Every Day Carry? Or just a basic, full functional, general purpose light. To me, EDC means you intend to carry it daily. Therefore there are certain requirements:
Small size - Anything too big, and you won't carry.
Comfortable - I want something that can slip in my pocket and not bug me. No sharp edges. Nothing gnarly.
Output - How much output does a EDC light need? I think 80 lumens is optimal for output and runtime.
Carry - How will you carry? I require a pocket clip. Otherwise the light "squares" or lays horizontal in my pants pocket and becomes uncomfortable. I want the light to fit in my Levi's 5th pocket and ride vertical for comfort. I want to access it easily by knowing where it is.
UI - I don't need SOS or strobe. The probability of needing any of these modes is highly unlikely. Plus, you can SOS any light. The modes just add more clutter to most UI's.
UI - I need low, medium, high. Low = power saving; Medium = general use; High = temporary throw. I rarely use my lights on their high/turbo.
Runtime - Is maximum extreme runtime necessary? Not for me. I just need my light usage to last 24 hrs. Then I can swap to my spares are put the batteries in the charger. However, I don't want to fuss with batteries on a daily basis. So I balance between battery swap (not necessarily runtime) vs. size vs. output.
If the light doesn't meet your EDC, you won't carry it when you need it. You'll misplace it. And when you need it, you'll be looking for it or wishing you didn't leave it at home.
Jake