I echo what someone said about trying a few out to see how you get on.
I was keen for environmental reasons, but also because with disposables they are festering for 2 weeks between rubbish collections whereas with washables they never sit for more than 2 days.
When DS was born I bought the most eco-friendly disposables I could find (bulk bought Moltex and Bambo online), and used these for the first 6-8 weeks, but bought one of each main type of reusable I was interested in - so an all-in-one (Bumgenius), terry + wrap, shaped + wrap (TotBots) and used maybe one a day to see which I liked, or if I liked them at all.
At about 8 weeks switched to Bumgenius - they go on and off like a disposable, and I never bothered soaking them overnight. Just put them in a bucket with a bit of teatree oil, then washed every other day. I usually do one wash a week at 60C and the other 2 at 40C and then line dry most of the time (tumble when weather bad in winter). Never had a problem with nappy rash with this routine. Only severe nappy rash we had was both times on holiday when using disposables.
After a while I started using a disposable overnight, as I found the Bumgenius and clothes were soaked through by morning, but use the Moltex or Bambo as they are the most eco-friendly disposables. DS is now 2.2 and we still use Bumgenius with disposable at night. Use disposables on holiday, or when staying overnight somewhere, but otherwise use Bumgenius.
Expecting #2 and will do teh same again.
DH was severely sceptical of reusables but now raves about them to work colleagues and friends!