It depends on the school. Some have you take the GRE as a formality, others use it for criteria to cut you out of the applicant pool, others actually care about your scores. Figure out what the schools
you're looking at fall under from the above list and then decide. Your scores, using the old vs. new GRE comparison chart, were very similar to mine, and I think I did well too. It would stink to have to take it again just for the writtten portion if you don't absolutely have to.
I know for my program, you absolutely had to have a 3.5 or better, or you weren't even given a second look.
If you have to take it again, make sure you do plenty of practice essays so you're more prepared the next time around. They seem silly, but it helped me a lot.