Good choice. Buy once, cry once.
Thats my thoughts on this. In the summer we have a pool we put up for the kids (and young adults..) and my daughter keeps it pretty well serviced. If we had a scenario this would be a great water source beyond our preps. The Berkey would allow us to drink from it.
I have also found the "NEBO" big larry lights on special at Wally world. I have several in the mail as stocking stuffers for those who would be here in a crisis. These are amazing lights for the money.