if i have to pick one for you, then it'll be waves. because they got more vsts on their line, some are specific usage, they imo got me on a better workflow because of their simplicity on the GUI design.
i also wanted to add Fabfilter on it too, because they got serious serious vsts. great GUI for people who are looking for those cool looking ones, and def great great result. the Limiter, Compressor, and EQ are my top 3 if you're going to check on it.