It fulfils your 3 requirements, plus it trumps the other 2 candidates in terms of looks (my opinion) an moddability (fact).
Being something other than an automatic scooter it also gives you the opportunity to develop yourself to be a more competent rider, instead of someone who just turns a throttle. You'll be more engaged with your ride and this I believe will have you enjoying the feeling of riding your bike for longer compared to riding the other two choices.
+ on the resale value, I've been watching the trend, KSR prices have consistently gone up in the 2nd hand market in past 2 years, and I believe even more in the future due to its relative rarity.
Doesn't matter if you just wanna ride it around the block or to the shop. if you gotta ride, do it in style