There really is no best design a lot depends on what you are wanting to accomplish.
A simple clamp and fold will make single and reversing bends by turning the work piece over.A finger break can make a wider arrangement of bends by gaping the fingers shallow boxes up to the depth of the fingers plus regular folding.
A closed end frame punch and die machine can do an even wider variety of bends and thickness by changing out the punch and or the "V" size of the die
the most massive build would be an open ended "C" frame type press break, the taller and deeper the throat opening of the end pieces the thicker and heavier they must be These machines are usually mechanically operate with gears and heavy screws or hydraulically driven. Additionally press breaks can have an infinite number of punch and die arrangements and designs.
Of all of these I lean towards a finger style folding break with open end pieces having a moderate throat depth. These would allow for forming longer parts than the actual break was designed for by making multiple shallow breaks moving the parts left or right until the desired bend angle was accomplished also very odd shaped parts can be made. They are more complex than a simple fold break but much less massive than a press break