...Should I take it again and try to go for 170+ ...
What were you trying for the first time?
What is the trade off worth?
I suspect with your scores you could likely receive reasonable offers at many fine schools across the country, and be in a 1L class in the Fall. You can of course double down and study really hard trying to get a better score on the LSAT. Perhaps you will get a 170+, and change the list of schools that will send you invites for the '12 school year, or maybe a shot at larger merit scholarships at schools that would have gained admissions to anyway. On the other hand, you may have a bad day at the testing center, your studies may simply not manage to get you over the hump and into the rarefied air of a 170+.
Do you have plans on what to do with a year of your life should you take the gamble and go for a higher score? Try to imagine yourself a decade from now, how do you think you would view this theoretical year if you got the score you would like. How do you think you would feel about the year if you did not get the score?