I plan to move my boys into CB-70s at around 1500 grams as well, provided they get that big. I know alot of folks keep males in 32 qt sweater tubs for their whole lives.

I plan on using the Exo-Terra hides for their whole lives, moving up in size as needed. Right now I have two of my boys in the Large size hide, but when I need to move to the XL size, it may require a CB-70 in order to fit two in there.