Avoid Hyosung. Not saying they’re bad, but they’ve gotten horrible reviews overseas where they’ve been available for years, and there’s no aftermarket. Also, finding a Hyosung repair center would be difficult.
The Suzuki GS500 and Kawasaki Ninja 500R are considered to be the end all be all of beginner bikes, but one thing I was told by people who recommended them to me is that you WILL want to upgrade to a bigger/better bike in less than a year. For that reason I chose the Suzuki SV650, which is a bike that is still beginner oriented, but can grow with me and has enough power and high tech components to ensure that no matter how good I get the bike will always be able to handle more than I can ever ask of it, acceleration or handling-wise.