The far left cleats are the Adidas F50. They were the lightest shoes at the time and felt pretty good. However, the material didn't really mold to me foot so it didn't give a me a good feeling for the ball.
The middle ones are the Nike Hypervenoms (the first edition). This was by far a game changer for me. Nike tried to develop a pair of cleats that mimicked a sock, so the upper (called Nike skin) really felt amazing. The first time I used them, after warm ups I could feel the heat from my foot. It molded to my foot perfectly and felt amazing.
The right ones, the Mercurial X (the one I recommended) are an overall solid boot. Great quality, good feel for the ball, light, and quite affordable. I love them.