Here's a little WIP screen of the A3 pages:
I'm currently using Illustrator but will switch to InDesign once the final base layout is finished. The page is currently a little big bigger than two A3s, but once it's in InDesign I can set up a nice grid system and mess around with the layout. I'll also add some renders of the final models once I have some, and/or remove the backgrounds from the concept images.
This is really quite fun! It's like doing a scaled-down pitch document; lots of prettiness and nothing but the most important, high-level information. Me likey!