400mm sounds good! Did you go for a smaller pendant?

I would get a better chandalier with better lighting and IMO DRs do not have to be bright as they are mostly used in the evening.

When you're doing lighting in a kitchen it's a good idea to have good directed light over the main tasks areas, cooking, dishwashing, food prep. You could achieve this with downlights directed at those areas, or track lighting where you can direct/angle each of the lights on the track. Re the pendant over sink area, would need to be at a height that ensures safety - water & electricity, not a good combo. There may be some NZ standards that you can refer to, to get the correct info.

Have you tried a custom lighting specialist?