Are you not tempted to go for UPVC ! Have used direct view in Prenton just for a front door and arched frame and were ok.
I wonder what they charged you fish? Five years ago my neighbour got a new upvc door and frame (not arched) with two small half height side windows from Everest for which he paid £3,000 pounds. Seemed a bit steep to me. It's a bit like getting British Gas in to do a job and paying more than twice the price you'd pay an equally well qualified private contractor.