I am currently in the same boat, looking replacing my current white pvc. They were installed 10 years ago and I cannot get any service fro some hinges that are broken, there is also some discoluring ( pink colour showing in some spot). Been to over 5 suppliers, alu-clad seem very expensive, looking at black PVC or RAL coloured Aluminium. Must fully decide yet but it is between Futura frames and Duggans. A friend got the Duggans Cream Timber effect, my sister got the Futura cream Timber effect. The futura one looked better from the inside. Got one timber quote for 75k, but they were fantastic looking.