What would be better, masters in accounting or finance depends on what you want to do after you are done with your graduate studies. If you want to sit for CPA then Masters in Accounting is definitely better. However; since you have an undergrad degree in finance you will have to fulfill the prerequisites for MS in Accouting. So it will be the same as doing MBA with accounting concetration for you. You will be abe to finish MS in finance in about 1and half years (full time); but Ms in Accounting or MBA can take up to 2-3 years.