I would definitely go for the mxs5.0, and maybe get the AA Solar Panel Charger for times when I had no mains power.
I know that I can trust the CTEK every time (I have had mine for six years, and used it almost weekly including for several three month absences in New Zealand), and could never trust a solar panel in that way.
Also, I keep my car garaged, so the solar panel wouldn’t work.