Try more clean power. 250 wpc is not all that much for Maggies. Better yet, have them gunned. You'll gain 6 db of efficiency witn the new crossover. It's not a cheap process, but it's sooo worth it. I had my 12s done last year, they came back looking awesome and sounding even better!
http://www.indiespinzone.com/magnestand.html
http://www.indiespinzone.com/magnestand.html