surefire are great, although the surefire imitators are getting better all the time.
Huntlight make a really good LED torch, possibly with better light that the surefire LED ones ( although NOT better than the surefire xenon bulbs)
there also way cheaper. check out huntlight on ebay
other pretty good knockoff brands are wolfeyes and copia. surefire are prob the best, but with someone like huntlight you get a better LED beam for less money. poss a tiny bit less robust, but likelly more than robust enough for most tactical use.
I dont rember the website, but the bear cub form bear light ( or something like that) is probably the best pocke tactical light available. bespoke design. they have one called the borialis ( sp?) that is just an insane ammount of light in a 3D cell maglight body. lights up a whole house from across the yard!