Don't believe everything (anything?) you read on forums unless you've proved it to yourself. The number of times I've heard of these wonderful new mats making huge improvements, only to find out the mat actually costs more than I paid for the turntable itself, is quite astonishing.
If you really must change it go for a simple cork compound type, as long as you are happy making any necessary changes to VTA (which could be quite tricky on a Technics), and don't spend more than the cost of a new double-album. 🙂