i have halo 3 but i was thinking of getting halo 3 odst. i know if i get halo odst i wont play campaign ... only multiplayer. should i stick with halo 3 and wait for halo reach to come out? or should i get halo 3 odst. i dont have alot of money so should i do it? should i just download the new maps from the internet to my xbox? im stuck what should i do?