the switch or sensor on the saber has a lifetime warranty.
but seriously, the best one is the one that suits your needs the best. Everyone will recommend the one that "got" them. Weather it be for the looks, the way it feels in their hand. They will all basically do what they were designed to do, hold a battery.
Its like buying a car. DO you want muscle, do you want handling, do you want an esthetically beautiful well designed piece of art or do you want a dependable mid priced one or do you want a ferrari?
What ever your needs are that will be the perfect mechanical MOD.
Look at what you want to spend, look at the build, reputation and dependability.
Now if I had all the monetary assets, you know Id be the Leno with a garage full of MODs