Def. Icebreaker. I have been wanting it forever.... 3 weeks ago I got it from Nightfall.... The week after another from Nightfall.... Its a game changing gun. The ammo regeneration is amazing and you can use it to regeneration ammo for your other special weapons by switching back to icebreaker when you are empty. I get 12 rounds for patience and time when swapping from my fully loaded icebreaker. I bought obsidian mind for my warlock.... Want to see how it goes with bad juju. I would suggest icebreaker because it's a rare sale and you can use it on all your characters.