I went to the Apple Store and chose the custom build mode, maxed out everything and added a 23 inch display - total > 10,000 USD.
I didn't buy it though.
They hit the streets here in the UK in august so I'll just have to wait a bit, hopefully by then they will ship with 10.3 installed.
Of course my plans to buy a PowerBook have taken a back seat.
Amen-Moses