Viridian, agreed on the metal subplatter, I found the Isokinetik ISOSub GT 2 S sub platter to be a very good investment.
BTW - The actual brand of acrylic platter that worked for me was the SRM/TECH Acrylic Platter
This is one of the 1" or thicker varieties available - with a thick rubber anti-vibration band around the outer edge.
When I was looking for a platter I came across several that were either 10mm or 12mm thick. Looked just like the glass platter
Since I considered the mass of the glass platter to be crucial to performance, I believed that replacing the glass platter with an acrylic version of the same thickness would offer no benefit since it would be lighter.
Which type of platter did you try?