If you were taking labrada charge AND having a cup of coffee as well, i'd order the non caffeinated version personally. In many studies it will show that using too much caffeine will have the same effects on you as not using any at all.
With the rok I try not to eat anything between taking it and working out. Then again, if I have food in my stomach when working out, it's usually a bad thing anyway. My workouts are pretty intense..and someone could lose a lunch
Is there a specific reason you eat pre-workout as opposed to post? I'd suggest taking your rok, then your coffee and labrada, working out with a bcaa product or protein shake during, and then eating a good meal after.