That looks good.
Co-incidentally mine arrived yesterday,

Without the benefit of a comparison before I ordered I just went for red as that's usually the brightest and the red ones on my TechEdge displays are more than adequate.
Not so spectacular as they're not assembled yet let alone powered up....
Two questions,
Bus extenders ? As I know nothing about I2C (apart from how to spell it) and there was another thread on your forum very recently where someone was using them, I googled it last week (in case I needed to order any bits) and all the places I saw said 1m plus easily unless the speed was really high. But if it is neccisary, which chips do you recommend ? (as I'll need to include for them on the board my displays will be mounted on and also a revised carrier board for my IOx-OEM).
Brightness ? I knew from the datasheets that it could be controlled but hadn't realised you were intending to do so. What would be the control input ? My best guess would be a biased light sensitive resistor (or transistor) into a spare IOx ADC or were you just thinking of a manual input, or just fixing it at one of the 16 levels ?
EDIT - and re. the 5V, I was intending to give them their own supply as I assumed the current would be quite high and I'm also going to include 10 LED "bar" displays (from the SLC analogue output) as per Don's suggestion so my power consumption will be even higher.
Rod.