You will forgive me Woolwell but having never used an on-line forum before I was not aware that you are supposed to continue with a "thread" (presumably by selecting the "post a response" button)even though a different question broadly related to a previous enquiry. Yes I did buy the D Link DIR 645 as it seemed to offer a solution to a wireless signal problem in the bedroom directly above the Home Hub 3 router. Being "technically challenged" and with no such problem in the room containing the existing router I was guessing the periodic buffering issue was one of the signal strength/direction limitations of an omni-directional aerial. Unfortunately I had not realised a modem was essential and ignorant of the fact that not all routers have one as in the case of the D Link.
The 2 Tablet PCs used wirelessly in the bedroom do not support the 5GHz signal. It is not that I doubted the integrity of Secret Squirrel opinion but I am hoping the "smartbeam" technology may provide a more reliable signal especially as I believe the 2.4GHz frequency is overcrowed.
Like so much in life it is not always a matter of intelligence but question of knowledge.