Bad news pal, you picked the wrong hobby if you're afraid of breaking things. Unless you can find a computer made of titanium (just about all bike computers are plastic), it's going to break under the worst conditions, ie. falling or crashing. And in those cases, just be happy if it's just your computer that ends up breaking (I'm guessing you'll never be buying a carbon bike).

Poking fun aside, my guess is that you want a computer for mountain biking. You can find computers with heavy duty wires that are just a little too thick and unwieldy for roadies like me. The Cateye ENDURO comes to mind. It's pretty much the standard cheapo' Cateye (no cadence) with "heavy duty" wires, but it still shares the "tiny" display you disliked about the Strada (as do all Cateyes... and most other bike computers).