I believe the original poster meant $350 for a pair, not each. However, Energy is a much-loved brand in this forum, and they have a
wide selection of bookshelf speakers that would be sure to foot the bill with that budget. I would be happy to own any of those speakers.
Also, to the original poster, if you are daring, you should check
these out. They are called Planar speakers, they operate on a different sound reproduction method than ordinary speakers. You have to hang them on your wall, and they are supposed to sound terrific. At $300 retail, or $325 factory direct, they fall under your budget. They have some drawbacks though, they need a good amplifier or receiver, and you have to be sure yours is up to the task. They also need a subwoofer because of the low-end roll-off at 100 hertz, but than again, most bookshelfs need a sub to sound good. But if you are feeling adventurous, you might give them a try. I have always been curious about them, someday I am going to get me some Magnapans.