I have the 6PX pro. It's an awesome little light, super bright and made really solid. I keep it in my truck now instead of the G2 model I used to have in there.
The only thing I don't like is that the low setting is the first to come on, I would prefer the bright setting first, but I don't think you'll have to worry about that with the 6PX, I think it's just the pro models that have low and high settings.