The Best Workbench Is Built, Not Bought
Building your own workbench can take more than a couple of angles. You can toss a piece of plywood on a pair of sawhorses or go to the far opposite end of the spectrum for something a little more traditional, robust, heavy; something that'll last a few generations. A great workbench is one you don't have to think about; it's heavy enough that it won't move as you work, and durable enough that it can handle the pressures of your pounding, clamping, planing and sawing.
That's why you'd pick some solid hardwood for your workbench.