I'd stay away from any NO products. In my opinion, and there is plenty of scientific evidence out there to support me, NO products for weight lifting and muscle building is total SHIT and way hyped up by supplement companies to make $$. I can point you in the direction of a scientific study on it if you want.

Pre workout I'd go for some caffeine if you want a little energy boost. But the essentials if you have the cash are most definitely:

BCAAS
Creatine Monohydrate

BCAAS will help your workouts tremendously. Try to stay away from supplement company's hypes on products. Most likely, if it sounds too good to be true, it is. Just read into the science behind the supplements ingredientes.