Not everything but certainly lots of it I believe is essential, but as we've both shown it's really down to your own requirements with the selection you go for and nobody is right or wrong on the matter.
Sorry to sound thick but can you explain the base 60 / 43p part a little more.
Yes 60 sounds perfect for your needs, I plan on doing road trips across Europe in mine so the extra battery/dual chargers etc would be essential for my needs especially as the inner kid decided it would be a great idea to order the D. Please don't tempt me with a track car as well, I'm still in the bad books with the Mrs for the Tesla