Need suggestions for trunk well...lots of glass or some mdf?

http://www.diymobileaudio.com/forum...-g8gt-big-motor-big-sound-fun.html#post681028

Thats my build thread, and am trying to decide whether to go with one big piece of mdf for two amps and a hole to drop my sub in or

use my sub ring, glass a box up against one side and then glass two mdf boards on the opposite side and connect them to the glass sub box using what else, more glass and try to utilize my stock center hold-down...