Its not the lights thats the problem. Its the heat the lights produce thats the problem. In my opinion i would use the fluoros. But the HPS will give better results undoubtedly. Problem is, if you have poor ventilation you cant use the HPS due to the fact that it will heat your plants to the point where it evaporates all the chloraphyl and water inside the plants...

PS- I wouldnt suggest using squirt bottles to mist your plants. With fluoros this is OK, but still can cause problems. But with HPS and only having two plants, well, misting them will leave water droplets on them, the water droplets will become magnifying glasses and could possibly help kill your plants quicker...