Given the choice of 10x22/10x30 and 1228, hands-down get the 1228.
Why?
1. 1228 has a D1-4 cam lock chucks instead of bolted on chuck like the 1022/1030. Changing chucks is a 30 second evolution.
2. 1228 has a separate feed rod for the carriage; 1022/1030 relies on the lead-screw to drive the carriage. The latter arrangement is only found on small lathes, and will wear out the lead-screw much quicker. The former method, the lead-screw will be just fine when your grandchildren are learning to use it.
3. Bigger is always better. The 1228 probably masses 50% more than the 1022/1030.
Here is the thread on the 1228 (I had to look around, cause Matt doesn't seem to have the 1228 on his website):
http://www.hobby-machinist.com/threads/pm-1228vf-lb.35363/
All that being said, if you have space and the budget, get a 12x36 machine (or Grizzly's shortened 12x24 version).
Why? The QCGB on the smaller machines is very VERY limited. You probably will swap gears on it every time you want to thread. The 12x36 machines have an open Norton QCGB that allow you to do almost all threading operations without switching change gears. Usually, only need to swap gears when you go from imperial to metric and back.