I don't recommend just a "fully automatic" charger (all of the pics you show) for all applications.
All of the fully automatic chargers I've run across will not charge a battery that has a charge of less than 25%. In my experience, if your battery gets down below 25%, you'll need a basic trickle charger to get it up above that, then you can use the fully automatic charger. The trouble is, you can't leave a trickle charger on all the time or you'll ruin the battery.
I recommend both a trickle charger and a fully automatic (or semi automatic) charger.
Also a heads up - you want to keep an eye on the clamps. I've seen clamps erode away on automatic chargers if you keep them connected to the battery for longer periods of time.