Definitely the new HyperMax XT. Only a single scoop is needed for an intense amount of energy and focus. Whereas people could go with 1.5-2 scoops with the older version, I have not seen a single person needing to go above a single scoop. This is due to the high amount of caffeine and Eria Jarensis Extract which not only gives you energy, but great focus and a euphoric feeling. The pump is real too at a single scoop. If you do not need a lot of stims, a half scoop with a full scoop of HV will provide energy and nice pumps, one scoop of each will be great energy and epic pumps If you would like some samples, send me a PM.