I think $100 is 7000 pts. That's the best ratio of what's available. I used to redeem at $50 for Hilton but held out the last time for $100. I think you have to redeem at least each year by the annual anniversary of your signup date or else you lose the points.

I wouldn't worry about it too much - 1000 pts one way or the other isn't a big deal with Hilton.