I don't know if anybody on here has tried out conqu3r but it is one of the greatest and strongest pre-workout products that I have ever used. It might cost a bit compare some of the other pre-workouts but I have never had a bad workout with it.
Even shelby gave it a shout out on blue collar muscle radio.
If you are looking for something new give it a shot. It also stacks very nicely with 75mcg of des and a brutal leg workout with many drop sets