The wide left-hand nav is fine by me. It looks weird, but frankly, I never
use the left hand nav.
Having it take a bit more space, though, makes the right hand easier to read. It's not too wide, where I have to move my head to read a line. It's also not too short, where too little text is on my screen at a time.
Like Goldiloch's final porridge, it feels just right.