I wish I had that option of a WSXGA screen when I purchased my M40 back in March. Wider viewing screen would help if your doing work such as CAD or graphic designing which i'm currently doing.
I wouldn't recommend you trying to revert to a previous bios just to be on the safe side. A failed bios is a bigger problem then that wifi annoyance :P... Might have to wait around for an updated bios release to fix your problem (=......
I went through 2 bios updates until it fixed my wireless problem. Could be a draw of luck. 1.20 > 1.30 > 1.60... Don't really know what causes the problem but sounds like its a random occurance between machines. Does your DVD drive...