So I am running a stock 1960b (recent model) with a custom pine A style cab on top loaded with regular 25w Greenbacks. Sounds awesome, but I really can't hear the bottom cab. I know the stock speakers are 2 db less sensitive than the Greenbacks and being lower are going to be harder to hear. I have 2 greenies inbound for the bottom cab. I'm thinking about putting these in the top positions and getting a pair of vintage 30's for the bottom slots as they are 2 db more sensitive. Or should I keep it all Greenbacks? Thoughts?