Personally, I'd concentrate most on a pair of bookshelves and maybe buy a less expensive used subwoofer a bit later down the road. There are a lot of great bookshelves out there in your price range. I personally like Paradigm's Mini Monitors (sticking to the $600, money left over for a sub) but I would give a lot of brands a listen and see what you really like. B&W, PSB, Polk, KEF, the list goes on and on. Here's my old man speech (I'm 42)...."Sonny, back in my day, you didn't have all these great bookshelf speakers everywhere, heck, back in my day, for $600 (adjusted for inflation), you had Baby Advents, and that's about it. You should consider yourself lucky to have so many great choices!"