My daughter is 19 months old and we have used cloth diapers since she was about 4 weeks old. I use chinese prefolds with Bummis Super Whisper Wraps and Aristocrat Wool Soakers fastened with a snappy for over nights. I believe that this is the more economical and environmentally sound way to go. With the all-in-one diapers like Bum Genius, the outer cover takes a beating since it has to get washed every time the diaper gets changed. The good thing with prefolds is that they take less energy to get clean,less energy to dry and less money to replace (although I have not had to replace any diapers.)
Anyway, there are a few things I recommend:
1.) A diaper sprayer for the toilet where you will be rinsing diapers. I use this one: http://www.pottypail.com/order.php?pp100094 (but I didn't buy the pail, just the sprayer with hose and adapter.) I exclusively nursed my daughter until she was 6 months and breastfed poop is water soluble so you don't have to rinse the diapers until they eat solid food or regularly drink formula. So, once it changes, you will want to have the sprayer so you don't have to get down and dirty every time. I probably would have given up this cloth diaper adventure a long time ago had I not had the sprayer... it really makes that big of a difference to me. But you won't need it until baby isn't nursing exclusively.
2.) Do buy a washable diaper pail liner (or two). It is so much nicer to just take the pail liner to the washing machine, turn it inside out to empty the diapers and throw the liner in too.... then you never touch the dirty diapers. As for a diaper pail, I do NOT recommend buying anything other than a garbage can with a step-opener. I have tried a diaper champ and a diaper decor and used both of them with the diaper pail liner but they couldn't even fit 2 days worth of diapers in them and I wash diapers every other day.
One last note, cloth diapers are quite a bit larger than the trim disposables. So, be conscious of that when you buy clothes and pants. We hardly use onsies unless it is freezing cold and she needs the extra layer. I recommend the Carters onsies because they are longer and thinner than gerber and other brands. The best pants that fit over the diapers are from H&M because they run pretty large and also Gymboree's pants work well too.
Good luck. Feel free to PM me if you have more questions.