JB73 - hope your move went OK.
The job is done. Hardware installed in new case. I couldn't get an extra two splitters for the 12 volt fan power supplies, so I've had to go ahead and plug two fans on the mobo. But it's not looking bad. The CPU is now cooler than ever at 44°, and the mobo is a steady 23°. Given that my room temperature is 22°, it's hard to imagine the mobo running any cooler, so do you still think I should get those splitters and use them for the fans currently plugged into the mobo?
I have to say I'm thrilled with the new case. It's much easier to work with than the old one. I have more room, and the fixed disk racks are secured by levers and can be removed in a trice.