I love my LD40 and I got it last fall.
I wouldn't worry about output and throw; despite the numbers, it kicks the TK15's behind real good (I have witnesses on that). In fact, it is one of my best throwers (in order): TK40, Predator, TK45, LD40. It has a really big reflector.. bigger that you would expect from the pictures... I sure was shocked when I saw how big the head really is. It is a little front heavy, but not so bad once you pop the batteries in.
The body feels very strong and you probably could rolls over it with your car. I wouldn't count on it breaking just by dropping it... It'll last.
I doubt anything really competes with the LD40 for a little while (as a throwy neutral light, of course)
the LD40 definitely is something to see in action! Sorry, didn't have time to put up pictures yet, but it'll come...