I concur with the others. You won't regret buying the bike. I should note that the availability for extra options from Zero were confusing when I bought my 2017 SR (in fact one dealer didn't even know you can only choose one). Here are the options:
- extra charging (charge tank), or
- extra battery ( power tank), or
- no extra anything, just the stock plastic storage area (saves $2000+)
In 2017 the S, SR charge tank was required to be factory installed, but our San Jose Zero dealer says 2018 charge tank is different and can be added although at higher cost than pre installed thus could increase your overall investment.
In the end, which option is really a personal preference based on your own expected usage. Some are happy to wait overnight to get 80% batt., but others, like me, want to do some touring now and then. Anyway the dealer who sold me my 2017 SR told me I could add charge tank later and this sadly was not so. Then again, recently I did an aftermarket purchase of diginow 9.9kw which seems a better option than the zero charge tank anyway.
All the best, and for goodness sake regardless of which option you choose, make sure to buy the bike!