Composite doors have become a really popular choice for those wanting an energy efficient, robust, highly secure and long lasting entrance door.  Available in a vast array of designs from classic and traditional suited to period properties, to modern and contemporary which may suit properties of almost any age and type.  You can pick from choices of glazing, handles, letterboxes and knockers, giving you a unique door.  With 1,000+ of shades to choose from, your only difficulty may literally be deciding what colour to go for.