am seriously into AAA lights as my favorite carry lights and even my work and EDC lights. They are just so handy to carry and the newest of them throw plenty of light for almost all my normal tasks. My pocket carry is an old LOPSE or a Microstream, and I have the Stylus Pro new and old versions, and both the Microstreams, and use them constantly, the Preon 2 AAA is my most carried light in my leather jacket for all seasons.
I am interested in the Pro Tac for my morning inspections at work, especially in winter, as it is brighter than the Stylus pro but has a low light which is handy for writing on inspection forms. One of its biggest pluses is turning on in high mode not some intermediate step to get to high mode as in the Preon and most others. I like this for quck flashing into corners and under vehicles at the highest intensity available.