Walter,
Yes, you're right!
Decisions can be hard to make, but unless I was trying to choose a charger for something critical like life support, I'd just do enough research to get one that could keep up with my demand.
My 5 Amp Deltran is doing a great job.
If you end up with one that is too small, you can always use it for something else.
Life is too short to fuss over little things.
Rob