Agreed: inexpensive is not usually at the top of my priority list for a door lock. 
But everybody has their own priorities.
There are really only three locks that work well with smartthings. They are all Z wave. Although there are some zigbee locks that also are supposed to work, there have just been a lot of issues with that integration.
The 3 zwave locks, all on the official compatibility list, are Kwikset, Schlage, and Yale.
Schlage and Yale are both good residential locks. There are some differences between them. Yale is a little quieter and uses a true capacitive keypad (like a smart phone) while Schlage uses the older style of touchscreen where you have to actually press fairly hard. Schlage offers more colors than Yale does.
Kwikset is about $50 cheaper and most locksmiths will tell you it’s much easier to break into. But it still may meet the purpose for some households. So it’s just something to be aware of.
The following should be of interest: