Heh I should aslo elaborate on why I think it's the best armor.
Guyver is a Bio-Booster armor. It merges with the host and memorize the hosts DNA signature. So if it gets it's head cut off it can regrow the entire body. It has a head lazer equiped, Motion Censor that detects enemy movement all around the user even through solid concrete so a sneak attack is impossible, two sonic blades that cuts through anything it touches, a Pressure Cannon, a Gravity orb to increase or decrease Gravity so it can fly, Super strength and Jumping abilities, bullet proof, Sonic waves for sound attacks, and two Mega Smasher that basically shoots off strong energy blast but requires charging time. If the user becomes unconsious it will enter hyper defensive mode and take over control and do everything possible to defeat it's enemies.
Orbital Frames are made of Metatron and they can float without having to use much energy they can absorb weapons from their opponent if compatible. They aren't hindered by weather or gravity. and can repair themselves simply by absorbing Metatron Energy or Electricity made by Metatron that's around them and do a complete repair. Not to Mention the onboard AI that analyzes the battle situation and helps the pilot control it.