We're quite keen on lite line illuminations which sells lighting sourced from a number of countries, including USA: http://www.halogenlighting.com/
:) Rhoda

The overall lighting design is important. Systemalux has always been helpful.

This question is really general, do you have any floor plans or pictures of rooms that you like?

Have you designed the home yet, 1800 SF, 5000 SF? Don't put the cart before the horse, the shape, size, and volume of a room will in part dictate the fixtures and finishes.