Hi Slim,
sorry wasn't on yesterday so only saw this now. If you are looking for something close to central London living you are probably better off sticking to the Vondelpark area and it's not an impossibility to find a house or ground-floor flat in that area with garden, but it will be a small garden. If your husband is working at the ABN Head office, it's also very convenient.
Amstelveen is about 10 mins further out on the tram from the ABN offices and it is more suburban but nowhere in Amsterdam equates to cnetral London living so the contrast between Vondelpark/A'veen is not so marked. We lived in A'veen when we were there and enjoyed it.
Really, both parts are very similar, Amsterdam-Zuid (Vondelpark) is more convenient for the British school, A'veen for Int'l school, both have pretty good shopping, restaurants, parks, lots of little open spaces for kids and large populations of expats.
Museumplein is only about 5 mins from what I would consider the centre of Amsterdam, where the main ring canals start and is fairly busy with traffic but again, nothing compared to London.
Any more questions, ask away.