Kwikset Obsidian
No key, use a 9V battery on the exterior terminals if you get locked out because of a dead battery
User codes 4-8 digits in length
Smudge resistant touchscreen, sometimes annoying to activate
Discontinued, but you can find them on Amazon
Compatible with standard US deadbolt prep, no additional drilling required
Has an automatic relock option, locks itself after 30 seconds. Just didn’t forget, if you propped the door open for a minute, the bolt is extended. Don’t mindlessly slam the door
Because this doesn’t have a keyway, I have no problem recommending this Kwikset. Kwikset Smartkey has gotten better, but still has vulnerabilities that I didn’t like.
Regarding integration to a home network, well… I’m not up on residential stuff, so consider this a starting point
If you’re looking for a higher security keyway or a more durable lock, I’d go with a smart lock retrofit kit like August or Yale Approach. These will mount to an existing deadbolt inside the door and turn it into an electrified DB, but the outside remains unchanged. I will say Medeco has some interesting standalone deadbolt solutions, but they are geared for larger systems and commercial use.
On the hardware side, you can’t go wrong with a Schlage B250 with a Primus cylinder. Other options are the ASSA 7000 series, the Medeco Maxum, or the Mul-T-Lock Hercular. Add a reinforced strike plate, and, if your really worried, a door wrap for another layer of metal reinforcement on the door, and you’re sitting pretty. Now the bad guys will take over look at your Fort Knox door, shake their heads in despair, and break a window instead.