We have a search function. If you had looked around at all before making this thread you would have seen one with the exact same topic that was last posted in 3 hours ago. And there is no "best". We have no idea what kind of cube you like or the size of your hands.
Something lightweight, lubed, with few lockups. I use FII, FI, and CII, depending on my mood.
(same thread as one started in the speedcubing section today. Also, 1Q1A thread)