go to the pioneer website, and check out the 'whisky barrell' speakers. they sound great...beautful woodwork, and they are close to your budget....limited #s and brand spankin' new. also check out av123 as well.
If you can find them used the Ascend Acoustics Sierra 1 would be a great choice -- great looks and superior sonics. Ditto the Epos M5, or you could get the ELS-3 new for about 400 bucks and obviously even less used.
Noticed there's a new pair of Silverline Minuets for sale here for $490. Another great choice.
As far as imaging outside the box you might consider the Gallo A'Divas if she's into balls (for looks I mean).
Hard to see going wrong with any of these. Best of luck.
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