Thanks for the wealth of information on these vitamins and amino acids!

I am looking to increase my vascularity. I have used L-Arginine in the past. From reading this I see L-Citrulline will also help with vascularity. Any preference in pill or powder for the arginine? I noticed that powder form gives 4,600 mg a serving where as pill form there was a max of 1,000mg a serving. Cost analysis would favor powder. However is one more effective than the other?