Bookshelf speakers under $300/pair?
Well, if you're willing to up the budget to $350/pair, then one of my favorites, the
Ascend Acoustics CBM-170 SE comes into play.
Axiom's M2v2 speakers are under $300/pair - though they really MUST be used with a subwoofer. If you're thinking of using the bookshelf speakers without a subwoofer, then the Axiom M3v2 are better for that for a little higher price (although they really should be paired with a subwoofer as well).
And, of course,
EMP is in this price range too.
Actually, with those three selections, you've got a great little lineup as follows:
The EMP speakers generally have a little bit of a high frequency roll-off, lending them a "warmer" and more laid back and forgiving sound. This is a good choice for an untreated room with lots of hard surfaces.
The Ascend speakers are about as neutral as it gets. I love them because, above all else, I love accuracy and a "tell it like it is" approach, which the Ascend CBM-170SE deliver in spades.
The Axiom M2 speakers are also highly accurate, but a touch on the brighter side. They're a great choice for a more "dead" room where a lot of acoustic energy is being absorbed by plush furnishings, thick carpet, thick drapes and wall hangings.
Out of the list that you posted, the Behringers would be a top pick as they are Pro Studio Monitors that, much like the Ascend CBM-170SE, just "tell it like it is".
Your speakers have to work well in your particular acoustic environment though, so hopefully, with the notes that I've given here, you'll have a little easier time
