Seems to me that people get to make something of a choice like that right now. God doesn't settle all accounts every Saturday: "bad" people don't get punished on a schedule, and "good" people don't get chocolates either. So, you really get to pick!
I think if you care about whatever is best or whatever is right, then you are happy as a matter of doing that, and not requiring another reward in order to act in that manner.
I actually am sure there is a reward for serving God, but it is not the reward of "getting stuff" (even Paradise Earth (TM)). I think the reward is God's Presence:
"Whatever was to my profit, I now consider loss for the sake of Christ. What is more, I consider everything a loss compared to the surpassing greatness of knowing Christ Jesus my Lord, for whose sake I have lost all things. I consider them rubbish that I may gain Christ and be found in him..." (Somewhere in Ephesians)
Psalm 16:2 Oh God, You are my God, and apart from you I have nothing good.
I don't want to be on Paradise Earth without Christ-- It is all rubbish apart from Christ.
bebu