I intend to buy a new Tripod but can't decide between the Manfrotto CX190Pro3 or CX190Pro4 Tripod. I'm thinking of using the 322R2 Ball head. It's for general use and traveling. I tend to go for the Pro4 because of the 50cm closed length. Re stability, it couldn't be that much different or?
My camera is a Nikon D300 with a 18-200mm f/3.5-5.6 lens.

Experience wise does anybody know the advantage and disadvantages of the above models?
Thanks in advance!