Erm M660 is no longer the most powerful.
The Mobile Phenoms are out namely
AMD Phenom tm II Quad-Core mobile processor N930 (2 MB secondary cache, 2 GHz, 1333 MHz front side bus, 35W)
However laptops with this Processor SKU is rare.
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Acer Aspire 4530
AMD Turion X2 2.1GHZ RM-72 1MB L2 Cache
4GB DDR2 667MHZ
NVIDIA 9100M G
320GB WD BEKT
http://aspiregemstone.blogspot.com/