We have had the best luck using Fuzzi Bunz. They are favorites because they are adjustable with snaps (versus velcro which can wear out or get gunked up with fuzz, etc) in both the waist and the leg. They are easy enough for hard-core sposie users (aka- grandma!) to figure out, and come in lots of cute colors and patterns too.
You can find them reasonably priced on ebay and diaperswapper.com if you don't mind used. I have heard sometimes you can find them on craigslist too.
Another great thing about them is that you can put as many inserts into the pocket as you need. For example, as my daughter was a heavy wetter at night, we would put 2 inserts for nighttime use and set the dipe to a looser setting to accomodate the bulk. As she wets heavily now, we always put 2 inserts in (and sometimes 3 at night.)
If you're interested in buying used, I have some smalls and also have some fitteds (but no covers) that I was thinking of getting rid of.
We have used fitteds and covers as backups (there is a phase somewhere around 8 months where it seems like you are changing diapers constantly again- the poop changes and flows- not to be gross, but UGH!)
I think you can find reviews of diapers at diaperpin.com and there is the discussion board at mothering.com as well.
I have had 2 Bum Genius diapers (one in small and one in medium) and they were not my favorites, though my husband liked them best. He wasn't the one holding her when she peed through them though!!! I'm not sure why she leaked through them, but she did. To give you perspective, she did have chubby thighs too, so I don't think that was the issue with her. I have read of people having problems with the PUL on them (having holes) but apparently they have pretty awesome customer service and will help you out if this is the case.
Good luck and feel free to contact me if you need more info. My "baby" is 18 months now and we're still cloth diapering- it's been quite an adventure! :)
M.