Favorite all around pre for me is Mesomorph or Conqu3r Unleashed. CU is being discontinued so you can pick it up for a ridiculous price from Olympus' website. I'm wanting to try Wicked from Innovative Labs as I've heard it's good too.
Mesomorph really gives me great focus and energy without being jittery. I do find it a little lacking in the pump department. CU is more well-rounded in that while the energy and focus is not as good as Mesomorph, the pumps are much better.
Favorite fat burner at the moment is Bloodshr3d Raw. Although this week I'm starting up a log for Radiate from RXS Supplements. From what I hear, it is unlike anything else on the market! Gave my wife a 1/2 scoop this morning and she said she could tell a difference in focus and body temperature compared to her normal morning stims.