Leveluk K8 is currently the top of the line anti-oxidizing kagnen water machine that Enagic makes for home use. It has 8 platinum coated plates and is capable of making the highest ORP water.
Leveluk SD501 is the most popular unit that has 7 platinum coated plates and has stood the test of time, while serving lots of people. It features voice system with English language.
Leveluk SD 501 Platinum is the fancier version of SD 501, it performs the same except for the fabulously good looks and ability to “speak” in 5 languages which are English, French, Italian, Spanish and German.
Leveluk JRII looks like the SD 501 machine, but it only has 3 platinum coated plates. It produces water with much lower maximum ORP and has lower output. It is however great for energy conservation.
Leveluk Super 501 is basically a commercial grade kangen water machine. It has 2 output hoses and can make a LOT more water. I’ve seen suggestions that it’s for large families, but I think that K8 or SD 501 will do just fine at home.