I don't know how hot it gets in Auckland in summer (I've only ever been to NZ in winter!) but if it gets hot, then go for a pale colour. Dark roofs should be kept for cold places!

Doesn't look worth it from that photo!

There are more cons than pros, I'm afraid. Near black floors will show every speck of dust and need constant maintenance. They also will suck up a lot of light, so you need to add lots of extra lighting. If they are shiny, they also show marks just as a mirror does. They are not the best for re-sale properties either, as most people prefer something more medium toned for the long term. I recommend going with a more classic floor, and then adding black accents in furniture, etc. Your kitchen could be mostly white cabinets with some very dark stained sections. Here are some ideas from modern to traditional. Click on the pictures to enlarge them.

Hi Joanna, There is a lot of different options to make this work for you. The landscaper is correct that you can have pavers under the spa. Typically in this situation we would pour a reinforced concrete pad to create the foundation and then wet lay the desired paver over the top. As long as the pavers have a solid base underneath them there shouldn't be any issues. Removing the timber retaining will definitely open up more space although correctly planting this could also create a great nestled in area and make it a great feature. As far as choosing the right paver for the space it probably has more to do with the house and the other areas. One option is getting a paver that contrasts with the cladding on your house and is similar to your joinery / roof colour. Have a look at www.urbanpaving.co.nz for some options, depending on budget I would either look at the Sandy textured coloured pavers or a natural stone option. Thanks, Will