Thanks so much for the information! I think traffic will be the number one difficulty, both getting used to it and learning to drive in it. It was a shock (to put it mildly!) when I first was exposed to it. But trying to navigate it in an emergency - I hadn't even thought of it. That's truly something to consider.
My husband's family lives very near the Chacarilla area of Surco, and it's where he's opened his business. It is a very nice, quiet area; maybe we'll stick to that. Miraflores may be a possibility if/when his business takes off!
But we're still not sure which school we'll choose - that will definitely have a huge bearing on where we live. We'd been looking at schools in La Molina, but if the traffic is that horrible to navigate, maybe we'll look more towards Surco / Miraflores.
Thanks again for your input, and your kind wishes!