Nakamichi - 12 x HIGH END Banana Bananas 24K gold plated for cables up to 6 mm² in Red (Electronics)
Keep Bombenfest, are cheap and easy to assemble. For installation, however, you need a very fine screwdriver for the screws. at 2.5²mm I would use the Amazon Basic plug, due to the simpler installation, but this is a matter of taste.