ishusing

Hi I gave GRE recently and got 321 marks (160 in quant and 161 in verbal). I am planning for masters in Fall2017 Computer Science from one of the following, GATech, Purdue, Uni of Purdue, Univ of Maryland, CMU, Stony Brook. I have heard that more weightage is given to quant score, so should I give GRE again, if yes, then I would not be able to give before 21 Oct. Would it be late to give GRE on that date. Thanks