I don't think they are absolutely needed, but they definitely help. It can take you from someone moving slowly from machine to machine, surfing the web on their phone and chatting to other members, to a monster.
The 5 pre workouts you listed are going to be great for most people, I did not care for them. Here are some of my top favs:
- Conqu3r Unleashed by Olympus Labs
- Wicked
- Outrage by Nutrex Research is pretty good and on the cheaper side
- Blackstone Labs Dust Extreme
- Mr. Hyde - Very hardcore on the stims, usually did a little less then the full serving.
- Cannibal Ferox Pre workout
- Muscletech Neurocore this stuff I was getting super cheap and it was pretty good, mostly just enjoyed how much it got me sweating and the focus was great.
I have MESOMORPH on the way, going to give it another try. If I recall hardly any pump and the shit just had me sitting on a bench starting at the wall. The taste is fantastic though, so I used my previous tub in place of my morning coffee.
All of the supplements totally depend on us . Some will give u best result and some won't even give u any feeling of anything .in order to keep up in a good shape we need to depend on our natural diets more than the supplements . now a days im not taking any pre-workouts just have black coffee before workout .
Yeah I need to cut down on the stims, probably close to about 600 mg of caffeine a day. The ones I listed above are caffeine and DMAA, so I will cycle them. Like you said some depend on us, some that worked great for a few weeks, don't seem that great any more. Diet is Key though..