I have a Ring wired doorbell, Ring floodcam, and outdoor Ring cam with solar panel. I also have a Nest thermostat E.
All work pretty flawlessly, though the Nest was a pain to setup due to the fact that I have a heat pump. I would suggest getting a Wink II to go with whichever you buy, Nest or Ring.
I have not tried the Nest cameras, though I have heard they work great. At the time I bought them all, Nest wasn't making cameras, so do keep in mind that Ring has a more mature product line, though that doesn't necessarily mean they are better.
EDIT: If you don't have a wire to your doorbell you can get a battery model, which is what I had on my old condo. Batter lasts about 2-4 months depending on how aggressive you have the motion sense/video turned on.
It's worth getting a video doorbell for security purposes alone. A thief will always ring your doorbell before robbing you, and I avoided being robbed exactly this way-- doofus rang my doorbell asking for "Bill", I answered from work that there was no Bill here, and then they robbed my neighbor.