My 1st son wore BG 3.0's from about 1 1/2 months until potty trained. He was a big boy though. I have 6 Kissaluv 0's and 2 covers. We used these with my oldest in addition to disposables. We'd like to eliminate the disposables completely this time around, but it is our last baby and don't want to spend a ton on newborn diapers. We are assuming that this baby will also grow like a weed and can then wear L's BG 3.0's. What do you recommend?