it depends where you are starting from... how strong is your quant how weak are your SC ? i would take a few diagnostic tests from kaplan
and PR ... this way you know where you stand. when i took my full length kaplan
diag i scored a 570 so i needed some work ... i got the kaplan course
2005 book kaplan 800
book (which i havent looked at yet) and the OG11
( which is amazing ) my last PP test was a 700 my gmat is in 10 days.
So like i said it all depends on how much work you need