The Silver Medallion MQD requirement was raised to $3000 this year. Definitely not worth $900. Unfortunately, you will also not get any rollover MQM's if you don't at least hit Silver. If you have a DL Amex card and are near the $25K spend threshold, you could buy some gift cards to get over it for the MQD waiver.
http://www.delta.com/content/www/en_...n-dollars.html