dell has both $350 off (coupon code: LRKR20M9TJ8VLM) and 35% off (4P0P6KTS7J97DF) dell vostro systems over $900 until the 29th.
for example, this would allow you to get a slim tower i5-2400 system + windows 7 + 23" dell professional monitor for $565 (i just configured one recently). not sure on the blu-ray player.