My internet access is limited in my home, mainly due to low grade ADSL rural broadband provided by old copper wire.  My router/modem is a Linksys XAC 1200 connected to PC via ethernet.  I'd appreciate opinions on whether a more extensive range can be achieved by either 1) wired access point or 2) a powerline adaptor kit.  I understand extenders/repeaters will reduce the functionality of the primary router, hence the above selected options.  So, if option 1, any recommendations for brand/model?  And if 2, once again brand/model ... but more importantly I'd like to know if there is a maximum distance the wired plug can be from the primary router?  I currently have an ethernet cable available approx 8 metres (real distance or approx 15 metres of cable) from the router.  TIA