Asus without a doubt 5870 is fastest single mobile card, performs between 5750 and 5770 desktop card (800shaders 700mhz clock). Only sli\cf configurations of mobile cards beat it.http://www.notebookcheck.net/ATI-Mobility-Radeon-HD-5870.23073.0.html
360m is just a respin if 260m which is like a gt240 desktop card (96 unified pipelines, undisclosed Clock speeds)
I know which I would rather have in my desktop, 5750/70 way beats gt240 any day of the week.
Also Asus beat Toshiba in the reliability index but both were top 5 so both good.http://www.tomshardware.com/news/asus-apple-lenovo-rescuecom-reliability,9720.html?xtmc=reliability&xtcr=1
Only thing i like is the toshibas SSD option, but leaving that out of the asus makes it cheaper.