Some also add 150mg caffeine but I try to stay away from such a high doses.
On my last WL max out that I peaked for (I was going to go to a meet but opted not to because of $$$), I had imbibed around 745mg. No, I didn't have any problems crashing out nor did I feel like my heart was going to explode or have a high HR.
I used CM during the summer with Beta-Alanine and Creatine but found the first two to not be worth it. Then again, I WL. Some of the documentation shows that BA is only worth it for much higher reps and the same is possibly true for CM.
Light days: Diet cola which is 20-30mg. Also on off days so I don't have to deal with caffeine withdrawal but is far less than training days.
Medium days: Rockstar (they're cheap at WinCo) which are 140mg. Sometimes a diet cola when I wake up.
Heavy as all get out days: Diet cola, Rockstar otw, pop a 100/200mg caffeine tablet (I only found the 200 at Winco the other day). Sometimes generic excedrin which is 65mg each, so 1 or 2 depending how much I ache.
Meet days. All the caffeine. My buddy likes Spike from TNation but the Yohimbe is no bueno for me as I get nausea from that.
I generally drink the 0 cal energy drinks though sometimes you can't find 0 cal redbull around and have to go with the one that has 3g of carbs.
Be careful with that, it still have artificial sweeteners which are not doing your body good.