Willow - do you know what are slimmest fit with good safety for over 4 average height.
Honestly I don't I can look into it for you though. I have a 3 year old so am not quite up with the 4+ seats yet. My passion is ERF so I have mostly looked at rear-facing seats. But I do know people who will know or have researched the 4+ seats much more than me. I think Freya is one who would have a good idea on 4+s.

I know when I went to the shop where I got my Compaq to try and by the Ezycombo - they were quite sniffy about it and I mentioned the CREP ratings and he suggested something similar to Nickle730 about that the selection of seats wasn't that random.
This is very interesting! I'd love to find out more about this.

Don't think you'll ever find seats that will fit 3 across comfortably unless Australia stop being stupid and upgrade our restraint quals completely. You could fit 3 Diono Radians across a backseat easily in any mode (it's a 0-10y seat) but its not sold here.
Yep I agree Freya Australia needs a complete overhaul and has to stop living on the fact we used to have the best CRS in the world. Yes our top tether is awesome, but other countries now also use top tethers and IMO the Swedish style tether is superior to ours.

I also agree about the Radians being great seats, and great for 3 across.