Nobody beats Motorola in flip phone design or any of their designs from the mid-1990s through mid-200s.
RAZR2 V8 (Luxury Edition)
I've owned the V600 and RAZR V3 and it's a tie in my book. The RAZR did have a video recorder which pissed me off with the V600 because my Sanyo SCP-5500 had it.
Never owned the Motorola Aura. Looks really cool though. Too bad in came when a time smartphones with app stores took over.