Surrounds and subs placements makes sense...
I'd like to add my thoughts: Placing tower speaker will be very tight according to rendering and will severely restrict your choices to something like B&W XT speakers series (which I have had listened to - not bad at all, but expensive)
and this makes fronts and center a bit to close to need a center at all
As alternative and a great space saver I think this product might interest you:
Atlantic Technology - FS-5000
Yes, it's not cheap, but AT makes high quality products and I believe AH store (still does?) runs a 20% off sale on all AT products
Your surrounds and sub could be from a different maker