Bookshelf Speaker question

I want to splurge a little this coming tax-season, and want to spend between $300-500 on a set of bookshelf speakers. What would you guys recommend for my price range? I'm willing to buy used so that I can keep my options open. Right now, I'm looking at specs and reviews on the Wharfedale Diamond 9.1 or Totem Acoustic Dreamcatcher. I'm new to "better" audio, so any advice is appreciated. I listen to a lot of different types of music, so I'm looking for a speaker system that can handle almost anything. Thank you in advance.