RE: Mini Z speaker upgrade?

Can anybody recommend a 10" WGS speaker for a Dr. Z Mini Z? 

Yea ... the G10C ... or the ET-10.

I just don't get the concept of a tini-weenie speaker set up.

 

I've got mini Z through 1960a VET30/ET-65. I play low volumes at home and just love facing a WALL of sound. Not a little puppy barking away.