New uPVC front door. Which type?

[superstardeejay]

I'm going to have our old Rehau upvc front door and sidelight replaced. Things seemed to have moved on a bit since it was fitted.

Can someone explain the difference between composite and uPVC, and any pitfalls/brands that are good or should be avoided? There are tales on here of peeling, leaking, colour fading etc.

I fancy a dark woodgrain effect in a modern style.