I have a streamlight ProTac and I am very pleased with it. It never leaves my flying suit pocket and is perfect for walk arounds. They have a lot of products on their website so I am sure you will find exactly what you are looking for on there. Having owned various brands of torches, including a couple of Surefires I now wouldn't buy anything else as they match the surefures on quality and light yet are a fraction of the price and the majority use 'normal' batteries rather than the rather expensive lithium batteries.
Definitely worth a look.