Welcome to AA!
I'm going to very respectfully disagree with some of the others... either can be very interesting, colorful, and beautiful. I love watching our FW
tanks as much as I do our reef. They are different, but on a tight budget I'd opt for FW
. You can do a larger, planted display with rarer fish as compared to the same for SW
. It is about personal preference and personal choice though. I wish you luck with whatever you choose!
A properly setup and plumbed sump will not over flow with a power outage.