I see more 20v Dewalt than anything else these days, not to say that the latest Milwaulkee or others might not be as good or better.
Honestly I'd do a bit of comparison shopping, 2 drill or more sets , brushless models, and skip the small batteries & find a set with 3, 4 or 5 amp batteries online.
Then you can get the 20v to 18 adapter if you want the old stuff for backup. Later can get grinder, multitool, small blower, 1/2" impact , etc as a tool only to go with.
Honestly I'd do a bit of comparison shopping, 2 drill or more sets , brushless models, and skip the small batteries & find a set with 3, 4 or 5 amp batteries online.
Then you can get the 20v to 18 adapter if you want the old stuff for backup. Later can get grinder, multitool, small blower, 1/2" impact , etc as a tool only to go with.