If you want the absolutely best view of everything, you should take station in one of the control centers in the Thrust Ring.
Not only do you get a "ring-side" seat for the takeoff, but you also get to see the unfolding drama as the habitats swing out and begin rotating.
It will be a trifle noisy, and the air-conditioning is a bit spotty, but the views will be wonderful!
You also get the strange transition seen in Kubrick's "2001" as the floor turns into a wall!
Wellden! That's where I'll be!