For high energy and tweak feeling, I'd go with 5% nutrition 5150. I have tubs of it but hardly take it cause I wouldn't be able to sleep for at least 6 hours after I take it. I usually prefer to have redcon1 Total War and I like this off brand one called Dark Metal Manson or Insane Labz. I've tried literally all the top preworkouts and those are my favorites. I refuse to buy garbage that most people buy at GNC or vitaminshoppe. Go online and order the shit, much better quality and cheaper prices