My Glock in the nightstand is Option one (Streamlight TLR-3), my EDC carry is option 2 (Fenix LD20).
I rail mounted light in a IWB, I haven't seen a IWB holster that would hold a handgun with a light mounted. I think that the handheld is better for EDC because you are not going to have the time to fumble with putting a light on the gun, you might not have time for the light period.
Kershaw Shallot 1840, Kel-Tec P-3at, Kel-Tec PF-9, Glock 17, Glock 19, Glock 26, Kel-Tec SUB-2000 9mm (Glock 17 mag compatible), Maverick Arms 88 Security 8-shot 12 gauge.