I used disposable for the first 2 months (and will be doing so again) then I switched to cloth, which for me were much much better than disposables at containing pooh and preventing leaks. We were changing all of DS clothes numerous times a day in disposables but with cloth nappies it was rare that the pooh leaked out. We also used reusable wipes which we stuck in the wash with our nappies.
It was an extra wash every second day for me, which I didnt' find too bad and I either line dried (in the summer) or put over indoor airers in the winter (with the heating on, they dried quickly).
And since I'm expecting number 2 now, will get to reuse them all so will save even more money :-)
I think I had about 18 or so nappies, but that was probably a bit on the tight side (think they recommend 20-25 nappies) but I got by okay.
Get in touch with your local nappy network and you can often get a trial pack of different types of cloth nappies at a much reduced price (e.g. our local council gave you a pack of 6 different type of cloth nappies and a wet bag for 35 quid). Also some places let you trial different types of nappies.
What I would say is don't commit to a large number of any specific make until you've tried them with your baby and are happy with them.
When we got our trial pack, I would use one or two cloth nappies a day to try and get them tested on all bodily fluids to see which ones worked for me and which ones didn't.
Hope this helps!