Stretchy one-pieces are the way to go IMO! So much easier to dress a squirmy baby or toddler without having to deal with any buttons or snaps. PERFECT for cloth diapering as it gives lots of room. The sizes last a lot longer than regular clothing too...
Ready Set Romper
Simple Seed is another great stretchy one-piece except they open from the back. They have a ton of cute designs. Also great with cloth diapers.