How about the classic Powered Armor
Power Armor I (Exoskeleton)
AC bonus +4
Armor check -3
Changes Strength to 18
Includes integral comlink and nightvision equipment
Powered Armor II (Combat Suit AKA Starcraft Marine)
AC bonus +8
Armor Check -4
Changes Strength to 20
Includes integral comlink, nightvision equipment, low quality sensor suite and one hardpoint (allows you to use a weapon without having to draw it)
Powered Armor III (Marauder Suit AKA Starwars AT-PT)
AC bonus +10
Amor Check -8
Changes Strength to 20 and size to Large
Includes integral comling, nightvision equipment, medium quality sensor suite, 2 hardpoints and jump jets I (speed 30, clumsy)
Powered Armor IV (Assault Suit AKA Starship Troopers (book) Powered Armor)
AC bonus +12
Armor check -4
Changes Strength to 24 and size to Large
Includes integral comling, nightvision equipment, medium quality sensor suite, 3 hardpoints and jump jets II (speed 60, poor)
Powered Armor V (Combat Mech)
AC bonus +14
Armor check -8
Changes Strength to 32 and size to Huge
Includes integral comling, nightvision equipment, high quality sensor suite, 6 hardpoints and jump jets II (speed 60, poor)
Shields
Alloy Shield: A plate of hardened Battle Alloy, weight 40 lbs, +1 AC
Force Shield: A solid circle of nuclear force, weight 50 lbs (includes generator) +2 AC
Energy Shield: A sphere of energy surronds the weilder, it provides protection but also distorts sensors, weight 100 lbs (includes generator) +4 AC, -2 to attack.