What type of roofing tiles - Refurbished 1970s bungalow

[boxrick]

Originally my architect specified Tapco or similar for my roof. However due to some changes in my plans my roof is now much stronger and I can basically have anything.

With that in mind for around 140-150 square meters of 19 - 23 degree pitch roof. What would be a good option?

It would be nice to get the whole roof for under 10k

Thoughts? 

[boxrick]

In the end for future searches I went for 'Sandtoft 20/20 Antique Slate' which are clay slight like and dark. Ideal for a shallow pitch, and got them delivered in a few hours by henshawsroofandbuild for about 7k including batons, ridge and valleys etc. 

Will update here with pics as they get installed.