Both of the ones that I bought were Spot. I considered the flood, but at 70-80 mph, I though the spot would be better, I'd just have to make the aiming a little better. I suppose either would work.
As for the heat... I have always been paranoid. My strobes, position, and landing/taxi lights are all cooped up together with no cooling. So before I actually installed them, I held them in my hand. They got warm, but not hot. After I installed them, I left them on for 5 mins. The plastic lense of my cover was never hot. I ran all lights for an entire flight... no problem at all.
RV-4 (not the builder)
0-320 (160HP) Sensenich Metal Prop