Personally I'd go tethered rather than untethered for security and convenience unless I have a regular need to charge the increasingly small proportion of cars with a Type 1.
I would not bother with a "smart" charge point unless you want to go onto a time of use tariff (such as Agile) - it's simple to modify a dumb one to run to fixed times.
I'd recommend a dumb charge point with discrete components such as Viridian as the life of some of the "smart" ones is not as good as the cost justifies, and there's too many suppliers in the market to guarantee the survival of any one. Others like PodPoint charge so much for a callout that repairs aren't economic.