Personally, I wouldn't put a non-sitting baby in nursery (and this is coming from someone who has put all three of theirs in nursery at 7/8 months). The ratio in a baby room is 1:3 and its usually up to 12 months, so you can get a lot of bigger crawling snotty babies - they're always snotty for the first year at nursery, investigating your little baby. Most parents don't tend to go back to work til a little later so most babies are older.
Nurseries generally only operate 7.30am-6.30pm in london and most do not like you doing more than a 10 hour day.
If money isn't an option, I'd go for a nanny, apart from the nanny being sick and having to cover holidays, there isn't a downside. Your baby can sleep when he/she needs to, do activities appropiate to his age and not have to have a late end or early start to his day. You also have a 1:1 when it comes to weaning. If you want to cut costs, a nanny with their own child of a similar age my be good.
I'm not massively clued up on childminders, but I'd be more inclined to put a baby with a smaller scale childcare provider than a nursery.
Plently of people also combine, 3 day nanny, 2 day nursery.
If you do want to choose a nursery, you need to visit a few now.
Best of luck with your new baby