Id go with voodoo, theyre well made, and the fact that their tough and lightweight (comparing to my lat 64 bag) is a win for me. The price isn't to bad i bought from Glide and saved a bit on shipping. Grip is a great bag but their design (colors, 'look') doesn't fly with me. Word is voodoo is supposed to being producing a backpack style soon but that could be months from now.
My buddy's GorrillaBoy was cool but fell apart on him and would not sit well on hills (he had the backpack style one you can sit on?) Granted he plays a lot more than me probably 30+rounds a week.