All three of my dses had dummies when they were babies - it worked for us, and when they were about 18 months old, we made the dummies just for bedtime/nap time, and then when each child reached about 2.5 (if I recall correctly - the youngest turned 22 this year, so it is a long time ago and my memory is not what it was
), we took them to a toy shop where they used the dummies to 'buy' a toy they wanted (and we paid when they weren't looking).
But that is what worked for us - you can only do what's right for you.
I do think that the posters who have advocated a 'wait and see' approach are giving good advice - and to be honest, that applies to a whole lot of parenting. We all have plans about what we will and won't do, as parents - and then our children come along and ignore the plans completely! They don't read the childcare books either.
Parenting is a 'flying by the seat of your pants' occupation. It is a good idea to make a flight plan, but you need to be flexible.
So if I were you, @MummyToBe89, I'd buy a couple of dummies - they are cheap, and if you don't use them, you can donate the unopened pack to a charity shop or a friend who is using dummies - but if you end up with a baby who won't be comforted any other way, you can try a dummy.
The one piece of baby equipment I have never bought or recommended, is a baby bath. I bathed my babies in the kitchen sink when they were little, and when they got bigger, they went in the bath - of course, when I had ds2 and ds3, ds1 was big enough for the proper bath, so I tended to just dunk the baby whilst the older one(s) were being bathed. I thought that was better than trying to fill and empty a baby bath. Plus the kitchen sink is at the right height for you to stand at it and bath the baby without having to bend over or kneel down, which I found easier.