Hi mrmonkey03029,
First off, a 680/Q43 is a strong Score, so it could be enough to get you into your first-choice School. There might be an issue with your Q43 though. Many Programs Schools (and especially Finance-focused Programs) view an Applicant's Quant Scaled Score as an indicator of how that Applicant might handle the 'academic side' of the Program - and a Q43 won't impress anyone. That score implies that you did fairly well on most of the "math" questions that you saw on Test Day, but you made a number of little mistakes throughout the section and you missed out on LOTS of 'strategy-based' points. This is meant to say that by focusing on Quant Tactics, you'll be better able to increase your GMAT Score AND better impress how Admissions Officers will view your potential to handle their respective Programs.
Since you know which Programs you plan to apply to, you would likely find it beneficial to speak with an Admissions Expert about your overall profile and plans. Those Experts should be able to answer your Admissions questions and help define the specific areas of your profile that could use some improvement. There's a Forum full of those Experts here:
https://gmatclub.com/forum/ask-admissio ... tants-124/If you choose to retest (and take the At-home/online version of the GMAT), then it's worth noting that there are some fundamental differences in terms of how that version of the GMAT is administered (from what you are probably used to seeing). The 'format' of the Test is fixed (Quant, then Verbal - with no break in-between, then an optional 5-minute break, then IR). Having to take Quant and Verbal in one sitting is challenging for many GMATers (especially if you've been taking your CATs with an 8-minute break between sections). If you want to take the At-home GMAT, then you will have to be really rigorous about how you take your CATs going forward (and take them in the exact same fashion in which you will have to take the At-home GMAT).
1) How long have you studied? How many hours did you typically study each week?
2) What study materials have you used so far?
3) On what dates did you take EACH of your CATs/mocks and how did you score on EACH (including the Quant and Verbal Scaled Scores for EACH)?
GMAT assassins aren't born, they're made,
Rich