Currently, there's a Powerbuy on Reefs.org for 175W Sunlight Optix II package for $198US. The 250W package is only $10 more.
http://reefs.org/phpBB2/viewtopic.php?t=37258
Or if you don't need a pendent, you can get a 175W HQI electronic ballast and 10k bulb at Ocean Encounter for $154US. With brokerage ($5) and shipping ($20), and conversion (x1.35), it comes to about $240Can.