TIN,
This is subject near and dear to me. I have all the Ex and EXe bodies and a couple of KL1s so maybe I can help. First, the disclaimer: I have my E1e married to my KL1 as my EDC.
I truly believe that the sleeper bodies for the KL1 are the clipless E bodies. Everytime, and I mean every single time, you pick one up the light it is properly oriented to your hand. With the EXe clips, you need to rotate the light until it comfortably fits that groove in your hand. Once there it feels good but it isn't as instintive as the Ex bodies.
The reason I carry the E1e is that my E1 is SG instead of HA. It looks odd with the KL1. In terms of pure comfort I'd go with the E1 unless you have this need for the clip. I found that the short clip is almost useless until you put a small split ring on it. If you prefer the E2e you might want to put on the M2 clip which makes the clip useful, IMHO.