Hello,
What do you have for a monitor?

I like the idea of rubber mounting or maybe even small coil spring supports for the HDD.
Wow ! 2x15" woofers

,
Yeah...now I'm thinking I'm putting to much thought into this project.
I decided to go with a 40watt, 2.1 computer type speakers so the tuned port woofer is already enclosed & shielded in it's own cabinet.
Thanks!