From your description I think the Silverline Minuets would be an excellent fit. They're small, refined, don't require much power, and pump out an amazing amount of quality bass for their size. In short, they sound like good mid-sized floorstanders and image like demons. There's a sale pending on a pair here for $480, so if you're patient and can stretch a bit it's hard to imagine these would disappoint.
Best of luck.
Best of luck.