EDIT: I guess I should have phrased that, "what would you do with your *first* 100 points?" =)
I bet this has been polled before, so I'll try to make it more interesting.
Which would you choose and why?
1. Go free/lose memories
2. Powerful weapon
3. Resurrection from memory
As much as I'd want to resurrect someone I think I'd go with a powerful weapon, first. This may ensure better scores in futuer missions. Raking in the points more quickly, I'd resurrect those I knew to be effective fighters. We could increase our numbers. Problem here is the wait time for points may go up since there were more on the team to divide point among. However, the pattern has been that missions grow in difficulty. In addition, I wonder if the powerful weapon would earn less points because of simplifying the mission.
I'd definitely resurrect Sakura-something Sei, that sniper guy, the first martial artist. Or maybe someone they knew, as so many did for kurono.
I hold something against izuki: the mass slaughter of innocents for his own ends. But then, what is GANTZ's ultimate motive? Forgiveness is not out of reach for him, but he differs greatly from katou's compassionate nobility which kurono inherited. Izuki fights for bloodlust sport.
But then there's this consideration: the absolute last mission is completed, no more GANTZ and you delayed resurrecting a friend in favor of the weapon and no longer have the option of seeing them, again. That would suck.
Going free is not an option, in my mind. It's a false freedom. I lose who I have become due to lost memories (as we saw happening to kurono) and may end up dying as a bystander when I could have been fighting for my life and the lives of others--deprived of the chance to keep making a contributing difference for the better. No, I'd rather keep fighting until victory is attained, or my own bitter end. Who knows, hopefully someone would resurrect me. =)