Well, since no one has proved which actually throws further, and they should both show about the same performance because of the similar reflectors, we don't actually know if the Thor or the Blitz throws further. But, then you have to count that the Blitz is 50watts, where as, I think you markdi, are the only one with a 50w HID Thor at this time. So most others have 35watters in their Thors which I definitly don't think throws as far as the Blitz....
We just need proof that we don't have.
Anyway, the modded Thor is as cheap and easy as it's gonna get. The Havis-Shields is nice but it doesn't posses as much throw.