Hey Scott,
I've owned the Ridgid, Imperial 400/402, and the Parker Rolo-flair. In my opinion the Rolo-flair is the best.
The Ridgid does a great job on the inside of the flare, but scores the outside and upper flare surface. The Imperial makes beautiful flares but is expensive and can be awkward. The Parker makes nice flares inside and out and is pretty well designed.
David