I really like Keen work boots. I work outside a lot so only composite toe for me. Steel or Alloy get WAY too cold in the winter. I also only get waterproof. The last several years I've been running Davenports. The sole wears a bunch at first but once most of the siping wears off they hold up pretty good. All the Keens are quite a bit above $100 though.
I had a pair of Keen work boots recently (love their hiking boots) and they absolutely fell apart in no time at all. I was super disappointed, they're very comfortable... but within 6 months, they were junk.
I'm hard on boots at work though, but I've never had a pair of boots come apart like the Keens did.