What subwoofer - make / specs/ etc would be recommended for me to use for my MA- 15D Edirol Speakers. As far as room size, I am operating in a 10X 10 room with several walls treated. I have not used a subwoofer yet for monitoring but want to start. 

Thanks in advance for any ideas on this..... 

This one from M-Audio will do a decent job for not a lot of money. I've been using that model's predecessor for about 8 or 9 years, taking a chance on a relatively inexpensive speaker after getting sticker shock seeing what they want for subs from ADAM. I figured it sits on the floor anyway and doesn't need to look like my mains. Turned out to do a fine job.