Recommendations for getting a UPVC door fitted please

A friend needs a new door fitting and doesn't know where to start, so please any recommendations for a company to provide and fit it (based on own experience please, not people touting for business) advice needed on the best type of door, even if not UPVC, and sadly the best price...money is an issue.

I use Don Valley Windows. Very good quality, there are cheaper companies but I'd not want to 'go cheap' on something that provides security for the home.

I would rather have a good old fashioned wooden door rather than a UPVC one. I think UPVC doors look ugly and I don't think they are particularly secure.

Blue stone upvc on here....

And they fit good locks.

Andy