I have two 1911's and both have the 4.25" barrels. Both have functioned perfectly. If you prefer to carry, this size is perfect. I have shot both 4.25" and the 5" barrels ....... and if you have a quality 1911, you will not notice any difference, as far as accuracy or muzzle flip.
My Ed Brown Massad Ayoob is the best pistol I've ever encountered !