You're welcome, I'm also expecting to be in the same situation as you in the next couple of years - and I'm also in the lower north shore (north sydney). I've also been looking into strollers, have my eyes on a collapsible maclaren which is a bit pricey, but the golf's boot (esp the R) isn't exactly huge hehe.
I definitely agree on the heat rejection stand point, but again, glass does block a lot of it already. I just think the topic's been way overdone, people have become obsessed with blocking out every bit of the outside world just to maintain a little bit of peace in their mobile bubble. If you read this article on UV/skin cancer etc you'd think it was the end of the world!!
My weather forecast app now tells me the bloody UV index ffs.
When my little ones come along, they will get a hat, a slap of sunscreen, and they're going outside to play. They're going to fall over, get cuts and bruises and scrapes and they're gonna learn naturally to harden the f up. Over-protection just sets you up for a bigger fall down the track.
Anyway back to window tint, do it because you want a cosmetic effect, not because you want to increase a statistic by a meaningless amount.