The Chronos clocks are very sturdy and popular. A lot of people like the Z-Mart clocks too.
Personally, I like the DGT North American and the DGT 2000 XL, though the latter is an older clock and has been replaced by a newer version I believe. Those are both plastic body clocks but hold up will if you aren't super rough with them.
I have had a Saitek chess clock for many years now. Its case is made of plastic but it has held up. A friend of mine bought that chess clock with the full metal chassis and that has only two buttons. I thought those were the standard clocks these days. When I complained to a chess partner friend of mind that I didn't want to lug my pieces all day at work so we could play in the evening, he went out and bought a clock. It seemed very cheap but the guy in the store told him it was the most popular one on the market these days. Within a week, it broke and stopped working.
What happened to those two button clocks that were so popular years ago? Don't remember the name unfortunately.