There's a shout to prevent fall damage, and I think you get it in the course of doing the main questline. Spending a perk seems like a waste.

The Nightengale armor does look awesome, and if you refine it, it has pretty good stats, but glass ended up even better, and there's a dragon one even better than that. TBH, full glass armor does give off the "I'm badass" vibe. The rediculous enchants I put on mine to back it up don't hurt.

I think the real thing to consider is that the heavy armor tree requires 3 extra perks spent to get full damage resistance and free movement.