Assuming you have minimal soldering skills and 30 min to assemble them the Dayton BR-1 Kit from parts express cant be beat in that price range.
I have a freind that had them before i purchased them and they sounded better than any other bookshelf i listened to untill you hit the $500+ price range.
i7 930 @ 4.2Ghz 1.35V -- Asus P6X58D-E -- Noctua NH-D14 -- Corsair XMS3 6GB 1600Mhz
SLI GTX 460 860Mhz -- Intel 120GB G2 SSD -- 2 x 1TB Seagate 7200.12 1TB in RAID 0
Corsair 850w TX PSU -- Corsair 600T case -- WD Green 2TB -- Seagate LP 2TB
Oppan Gangnam style all up in this mother!