Locks
Monoprice devices are cheap for a reason. 
For locks, your choices are Zwave or Zigbee. The biggest problem with Zigbee in a fixed location is potential interference from boosted wifi. If you want to run wifi cameras near the door (or a wifi video doorbell), then Zigbee could be a Problem. So Zwave tends to be more popular just since it avoids that issue.
The 3 brands on the official compatibility list are Kwikset, Schlage, and Yale. Most locksmiths would recommend Yale or Schlage. Kwikset is cheaper, again, for a reason.
See the following topic for a feature comparison:
Know that regardless of the brand you select, the only officially supported features are lock and unlock. Not setting custom codes or time schedules or anything else. You can still use these features by entering them on the keypad of the lock itself, but not from your home automations.
However, there is custom code available in the community that is very popular that will let you do full lock management. Works with both Schlage and Yale.
Also, no matter what brand you pick, if you choose a Z wave lock, it’s best if the repeater device closest to the lack ( typically a pocket socket or light switch) supports “beaming.” This improves message processing to the lock.