The wife bought me a Sony turntable a couple of years ago and since I've amassed a decent vinyl collection. It's one of those that allow you to convert vinyl to mp3 however I only use it for listening. As of now I have it connected to a cheap surround sound system but I'm ready to step it up a notch. That's where I need help...do I need to purchase an amp or can I get a nice set of book shelf speakers and connect them directly to the turntable? Also I need some brand suggestions