I tested pretty much every type of thrust-safe spear going before buying mine and I found Saxon Violence to be hands-down the best for balance, build, and look. In particular, their spears are less ‘thick and chunky’ than many others, making them both more realistic-looking and easier to handle if you don’t have massive hands.
They have many designs to choose from and are usually (always?) present at Empire events so you can try the wares.