Over a million I would at least want Caesar stone bench tops and good quality appliances. I think getting the cabinetry from ikea would be fine, as long as the installation was spot on. In saying that, cabinetry is the cheapest part of a kitchen, so getting a kitchen professional to do everything may turn out cheaper.
We have done 4 kitchens, mostly 4 weeks from first design meeting to complete installed kitchen, try and find a local business that makes them in their factory (so not freedom or kitchen connection - look in your local paper) as any issues will be rectified straight away. I have a friend still waiting for her freedom kitchen to be completed - 7 months after paying the first deposit!