Better start from the original GUNNM (I hate this 'Battle Angel' mis-translation.) IMHO GUNNM is one of the best manga ever created. Second to Naruto?! For me GUNNM is second only to Nausicaa (manga version) by Hayao Miyazaki.

BTW the English version changed a lot of names, such as Jeru and Salem. Many original names have biblical references (Jacob's Ladder, Melchizedek, Gabriel, etc.) and real places like NORAD and Kansas City, and I wonder whether the licenser are afraid of some form of accusation from parents et al.