No need to retake the 790; may look worse to any school that gets both scores, even if you get the 800 next time
While I 100% agree, given that the poster with the 790 has the username @grindboy , he may not be concerned about coming off as a test-taking grind. 
@CHD2013 @skieurope
Honestly I’ve retaken so many tests at this point that it’s the least of my concerns
What prep books were the most helpful?
780, hooray!!! Was expecting lower, but I’ll take the surprise lol
I’m taking the June test. Any advice on test prep and the best books for the prep?