Everyone should ask their local rabbi, but just to be helpful to others that are interested
This web site says, the only shavers halachic authorities are in agreement you can use out of the box are
Norelco shavers which say COMFORTCUT or CLOSECUT on the heads.
Are these the best shavers, no, that is the point, not to get that close that is called halachic shaving.
please follow link below for more detailed information.
http://www.koshershaver.org/faqs.htm