The most DEVASTATING saber blow ever landed in the PT ?

Yes, but if you remove the death of Qui-Gon, the story would be completely different. Removing the blow from any other duel doesn't pivot the story in quite the same magnitude as the death of Qui-Gon does.

 

Obi-Wan Kenobi is the baddest Jedi IMO , he took down Darth Maul in Episode I , and of course in Episode III taking Anakin down.

Remember ... The Master is always stronger then the Learner.

 

Obi-Wan took out Darth Maul and Qui-Gon failed...Obi-Wan was the learner...need I say more?

 

I think the most devastating blow was definitely Darth Maul killing Qui-Gon. Qui-Gon would have been a much better master to Anakin and he possibly wouldn't have joined the dark side.

Obi-Wan slicing Anakin was definitely devastating, but Obi-Wan was the one who went to hide in the desert for 20 years.

 

What about Anakin taking down Dooku in Episode III?

 

Best saber blow in PT for me is Anakin killing Tusken in AOTC.

-HUGE ASS wind-up.
-Gritting teeth.
-Pissed off.
-MASSIVE lightsaber sound effect upon landing.
-RAW emotion.

The only thing that sucked about it?
It cut away to Yoda meditating too soon.