Thanks for the replies, all.
I did ok on the test, so probably wouldnt improve that much, and probably won't bother. Guess i'm'a skip it this year, and try again. _really_ want that preferred school.
You have five months to prepare for October! Go for it. Work hard. You can do it. Sometimes it's enough to show the adcoms that you are trying to improve and that you really want to go. Think long and hard about waiting b/c you're still "warm" right now. It might be easier for you to improve your LSAT score now than after you've taken a year off. On the other hand, LSAC does have that three-in-two rule, so you don't want to use up your eligibility. Think it over. But consider that five months is enough time for a 10-15 point jump. People have done it.