You don't say whether it is the MG3 or MG3A. You would be surprised as how low the Maggies go. The reach down to 40 Hertz, which for the most part is all you may need. I am not familar with the Fostex. Are they still in production, can they be updated or repaired if needed. The Maggies can be! Magnapan offers repairs at a reasonable cost. They also sound great! I would go for the Maggies based on this variable. Well, I guess I have. I been a Maggie owner for the past 18 years.
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